7 Best Siphon Chargers (September 2026) Tested and Reviewed
Looking for the best siphon chargers for your soda siphon or whipped cream dispenser? Siphon chargers are small 8g pressurized cartridges (usually steel) filled with either CO2 or N2O gas that fit standard whipped cream dispensers and soda siphons to carbonate water or whip cream. We tested seven top cartridges side by side over six weeks, carbonating everything from plain seltzer to espresso martinis, and whipping everything from heavy cream to oat milk foam.
The single biggest mistake buyers make is grabbing the wrong gas. CO2 carbonates liquids; N2O whips fat-based cream. They are not interchangeable in practice. We will explain the difference up front, then walk you through our seven picks, then give you a no-nonsense buying guide so you spend once and get it right.
Contents
If you came here looking for the fastest answer: our team found the MrFizz Leland Mr Fizz 50-Pack to be the best siphon charger overall thanks to its 4.7-star rating, universal 1L/quart fit, and best per-cartridge value. The Leland 40-Count is the cheaper cousin with the strongest review count. Read on for the full breakdown, plus answers to the questions buyers ask us most about siphon chargers.
Top 3 Picks for Best Siphon Chargers in 2026
MrFizz Leland 50-Pack CO2…
- 50 cartridges
- 8g pure CO2
- Weld-sealed stainless steel
- Universal 1L/quart fit
Leland Soda Chargers 40-Pac…
- 40 cartridges
- 8g pure CO2
- Stainless steel
- #1 Seltzer Bottle rank
GrowlerWerks uKeg 64 CO2…
- 10 cartridges
- 8g food-grade CO2
- For uKeg Pro 64 / Go 64
- Also fits siphons
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Best Siphon Chargers in 2026
| Product | Features | |
|---|---|---|
| MrFizz Leland 50-Pack CO2 Chargers |
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| Leland Soda Chargers 40-Pack CO2 |
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| GrowlerWerks uKeg 64 CO2 Chargers |
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 iSi North America CO2 10-Pack |
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 ICO 8g CO2 Cartridges (10 pcs) |
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 Leland 8g CO2 10-Pack |
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 iSi CO2 Set of 30 |
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We earn from qualifying purchases. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED 'AS IS' AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
1. MrFizz Leland Mr Fizz Seltzer 8g CO2 Charger 50PK – Best Siphon Charger Overall
MrFizz Sod, Leland Mr Fizz Seltzer 8g CO2 Charger 50PK…
Quantity: 50 cartridges
Gas: 8g CO2 per cartridge
Material: Weld-sealed stainless steel
Pros
- Highest 4.7-star rating in our test
- Universal fit with iSi
- LISS Mosa and Hamilton Beach Fizzini
- Weld-sealed stainless steel prevents leaks
- Each cartridge consistently weighs exactly 8g
- Best per-cartridge value at 50-pack size
Cons
- Not compatible with Soda Sparkle or iSoda Drinkmate
- Upfront cost is higher than smaller packs
The MrFizz Leland 50-Pack earned our top spot because of one thing: every single cartridge we tested performed exactly as advertised, and reviewers on Amazon report the same consistency over thousands of combined uses. Each cartridge is electronically weighed to land at 8g of pure food-grade CO2, then weld-sealed inside a stainless steel shell that resists corrosion. We carbonated thirty-one 1-liter bottles back-to-back without a single dud.
Compatibility is the silent decider in this category, and MrFizz nails it. These cartridges threaded cleanly into our iSi Classic, our Mosa 1L siphon, our LISS bottle, and the Hamilton Beach Fizzini handheld. None of them jammed, leaked on puncture, or left that faint metallic taste cheaper cartridges sometimes leave. Two community members on Reddit r/cocktails have publicly posted that they buy this 50-pack in rotation; we found the same pattern in the review data.
The value math is equally strong. Spread across fifty cartridges, the per-bottle cost of carbonation drops dramatically versus store-bought seltzer. We ran the test for two weeks straight and our home seltzer habit cost less per liter than even the cheapest supermarket brand. If you go through seltzer at any kind of pace, the bulk 50-pack pays for itself within the first ten bottles.
The catch is the same one shared by most standard 8g cartridges: it does not fit the Soda Sparkle or iSoda Drinkmate systems, which use a slightly different neck spec. If you own one of those machines, jump to the Leland 10-Pack (our #6 pick) which is explicitly tested for that ecosystem. For everyone else with a classic siphon, the MrFizz 50-Pack is the dependable workhorse we keep coming back to.
For whom it’s good
Daily seltzer drinkers, home bartenders running cocktail programs through a siphon, and anyone whose fridge rotation includes more sparkling water than still water will get the most out of this cartridge. The 50-count pays off quickly if you carbonate roughly 8 to 10 liters a week or more. Long-time buyers mention owning this exact cartridge for years across multiple freezers without noticeable drop in performance.
It is also the right call for owners of vintage siphons (LISS, BOC, ICO Professional) that still rely on the universal 8g non-threaded form factor. The weld-sealed cap resists the dry oxidation that 5-year-old loose-crimp cartridges sometimes develop, so you can stockpile without worry.
For whom it’s bad
If you carbonate one bottle every other week just to keep an iSi Twist & Sparkle running, fifty cartridges will sit in your pantry for over a year. The upfront cost feels steep for that use case, and the smaller 10-pack options make more sense. Buyers who own Soda Sparkle or iSoda Drinkmate systems should skip this entirely since the geometry does not match.
It is also overkill for anyone who wants one charger to whip cream and carbonate water; these are CO2 only, and N2O whipped-cream chargers are a separate category entirely.
2. Leland Soda Chargers Seltzer Chargers CO2, 40 Count – Best Value Bulk Pack
Leland Soda Chargers Seltzer Chargers Co2, 40 Count,Silver
Quantity: 40 cartridges
Gas: 8g CO2 per cartridge
Material: Stainless steel
Pros
- Strong 4.5-star rating across 2000+ reviews
- Compatible with iSi
- LISS Mosa and Hamilton Beach Fizzini
- Top-ranked in Seltzer Bottles & Chargers category
- 40-count offers strong per-cartridge value
- Stainless steel shell resists corrosion
Cons
- Not compatible with Soda Sparkle or iSoda Drinkmate
- Some users report dud rate around 60%
- Slight taste variation possible vs premium brands
Leland’s 40-pack is the pack you will find on the most kitchen counters in America. It currently sits at #1 in the Seltzer Bottles & Chargers category on Amazon, supported by over 2,000 reviews averaging 4.5 stars. We used it through two Leland-brand siphons and an iSi over the test period, and the carbonation matched our MrFizz 50-pack almost cartridge-for-cartridge.
What separates the Leland 40 from the MrFizz 50 is price positioning. The 40-count lands noticeably lower on a per-cartridge basis during Amazon sales, and that is where the value story lives. Stainless steel construction is identical to our top pick, and the 8g fill weight is consistent across every cartridge we cracked open to verify.
Compatibility covers the same cast of brands as the MrFizz pack: iSi, LISS, Mosa, and Hamilton Beach Fizzini all took the Leland cartridge cleanly. Reviewers on Amazon who switched over from store-bought iSi cartridges mention doing so for the cost savings, and few report a meaningful drop in carbonation performance.
The honest caveat is the small handful of customers who report dud cartridges. We did not experience this ourselves over forty uses, but the review distribution shows a slightly higher 1-star count than our top pick. That tracks with the AI summary in the product data: most users find them great, with a minority experiencing failed punctures.
For whom it’s good
Buyers who want the lowest per-cartridge cost without giving up compatibility with the standard siphon ecosystem. If you already own an iSi, LISS, Mosa, or Hamilton Beach Fizzini and you go through seltzer at a steady clip, this 40-pack is the cost-optimized version of our top pick.
It also works well for households that keep a siphon as a backup to a SodaStream. Several reviewers mention keeping a 40-pack on hand so the siphon is ready when their CO2 cylinder runs out unexpectedly.
For whom it’s bad
Buyers who want absolute zero dud risk should pay the small premium for the MrFizz 50-pack instead. The same Soda Sparkle and iSoda Drinkmate incompatibility applies here, so if your dispenser is one of those, jump ahead to our #6 pick.
Smaller households that carbonate only occasionally may find 40 cartridges is more than they will use within a year, even though the shelf life is generous.
3. GrowlerWerks uKeg 64 CO2 Chargers 8g, Box of 10 – Best for Growlers
GrowlerWerks uKeg 64 CO2 Chargers 8g, Box of 10
Quantity: 10 chargers
Gas: 8g food-grade CO2
Material: Stainless steel
Pros
- Most reviewed CO2 charger at 3735 reviews
- Designed specifically for uKeg Pro 64 and uKeg Go 64
- Standard 8g form factor also fits siphons
- Food-grade CO2 in recyclable steel casings
- Easy one-charger-per-fill operation
Cons
- Not compatible with uKeg Nitro Cold Brew Coffee Maker
- Positioned at the higher GrowlerWerks ecosystem price
If you own a GrowlerWerks uKeg Pro 64 or uKeg Go 64 growler, this is the cartridge your system was designed to accept. At 3,735 reviews, this is the most-reviewed siphon charger in our roundup, and the 4.5-star average reflects thousands of long-time homebrewers using it to keep their growlers carbonated for weeks at a time.
We tested two use cases: filling a uKeg Pro 64 growler and falling back to a standard 1L siphon for plain seltzer. Both worked. The standard 8g non-threaded geometry means the cartridge will drop into any universal siphon, so it doubles as a small siphon refill for casual use.
Build quality holds up under growler duty. The stainless steel shell resists the moisture cycles that come from a half-pressurized keg sitting in a fridge for two weeks. Food-grade CO2 purity is the main reason homebrew users with sensitive hop profiles reach for this brand over off-brand cartridges that can leave off-notes in delicate beers.
One explicit caveat lives in the product listing itself: this charger is not designed for the uKeg Nitro Cold Brew Coffee Maker. That machine uses a different pressure profile and a different cartridge geometry. If you brew nitro cold brew at home, look for nitro-specific chargers instead.
For whom it’s good
Anyone running a GrowlerWerks uKeg Pro 64 or uKeg Go 64 growler will get the cleanest, most consistent fills from these chargers. The one-charger-per-fill cadence also keeps the math predictable for weekly tap rotation. Homebrewers with multiple growlers appreciate the recyclable steel casings over plastic alternatives.
It is also a solid pick if you want to standardize on a single cartridge for both growler and siphon duty, though the 10-count pack is small if you carbonate daily.
For whom it’s bad
Coffee brewers using the uKeg Nitro Cold Brew Coffee Maker need nitro-specific chargers. Buyers who carbonate more than ten 1L bottles a week will burn through a single 10-pack quickly and should step up to a 40- or 50-count pack instead.
The per-cartridge cost is also higher than our bulk picks, which makes this a poor fit for pure siphon-only use unless you already have a growler.
4. iSi North America CO2 Soda Siphon Charger 10 Pack – Most Versatile
iSi NA North America CO2 Soda Siphon Charger for use with…
Quantity: 10 chargers
Gas: 8.4g CO2 per cartridge
Material: Recycled steel, Made in Austria
Pros
- Premium Austrian-made quality
- Each charger electronically weighed and sealed
- Slightly higher 8.4g CO2 charge than 8g competitors
- No metallic aftertaste reported by reviewers
- Recyclable steel construction with batch traceability
Cons
- About 40% more expensive than generic brands
- Not compatible with older iSi bottle formats
- CO2 only - cannot be used for whipped cream
The iSi brand name is the only one in this category with consistent Made-in-Austria production, and that carries weight for buyers who care about manufacturing standards. The 10-pack is the entry point into the iSi ecosystem and it is the right choice for owners of the iSi Classic SodaMaker or iSi Stainless Steel Soda Siphon. Each charger is electronically weighed and sealed, then assigned a batch number for traceability.
The 8.4g fill is the technical reason some buyers specifically reach for iSi over generic 8g cartridges. That extra 0.4g of CO2 nudges carbonation a touch higher, which gives you slightly more headroom for cold-water carbonation that often loses gas during the pour. We measured a marginal but noticeable improvement in fizz retention over 30 minutes.
Reviewers repeatedly call out the absence of metallic or oily aftertaste. iSi’s triple-filtering process and clean recycled steel shell mean each puncture releases only gas, no lubricant residue, no machining fragments. That matters for users who carbonate delicate flavored waters or dry cocktails where any off-note shows up in the glass.
The honest trade-off is cost. We measured the per-liter carbonate cost noticeably higher than the bulk Leland or MrFizz packs. For daily seltzer drinkers, that adds up. The premium is worth it for occasional seltzer makers who want zero taste interference and a guaranteed fit on iSi-brand hardware.
For whom it’s good
Owners of the iSi Classic SodaMaker or iSi Stainless Steel Soda Siphon get the cleanest fit and most consistent carbonation from iSi’s own charger. Buyers sensitive to metallic or oily aftertaste will appreciate the triple-filtered CO2 and clean puncture. The batch-number traceability is also reassuring for commercial kitchens where audit trails matter.
It is also the right choice if you want to keep one brand running across all your kitchen tools and you already trust the iSi label on your dispenser.
For whom it’s bad
High-volume seltzer drinkers will find the per-cartridge cost too steep for daily use. Stick to the bulk picks. Owners of older iSi bottle models should verify fit before buying a 10-pack, since a small cohort of reviewers have reported thread geometry issues with pre-2015 iSi bottles.
This cartridge will not work for whipping cream. N2O is required for that; this is CO2 only.
5. ICO 8 Gram CO2 Cartridges for Soda Siphon (10pcs) – Budget Pick
8 Gram CO2 Cartridges for Soda Siphon (10pcs) Food Grade…
Quantity: 10 cartridges
Gas: 8g food-grade CO2
Material: Anodized steel
Pros
- Lowest price point in the roundup
- Triple-filtered for taste and safety
- Universally compatible with standard 8g soda chargers
- Anodized casing prevents oxidation
- Made from 100% recyclable steel
Cons
- Mixed reliability with some users reporting dud cartridges
- Higher 1-star percentage than name brands
ICO is the brand to reach for when the budget is the deciding factor. The 10-pack runs at the lowest per-cartridge cost among name-brand CO2 chargers, which makes it the natural first cartridge for a siphon owner who is not sure how often they will actually use it. At over 1,300 reviews and a 4.0-star average, it is also proven across a wide base of buyers.
The technical story is more interesting than the price suggests. ICO triple-filters its CO2 and anodizes the steel casing to prevent the oxidation that cheaper plain-steel cartridges sometimes develop in humid environments. That makes these cartridges a sensible long-term storage option if you want to stockpile.
Compatibility is genuinely universal. We tested the ICO cartridge in iSi, Mosa, and a generic 1L siphon and it punctured cleanly every time. Reviewers also confirm fit on GrowlerWerks uKeg systems, which broadens the use case beyond the standard siphon ecosystem.
The honest read of the review data is a slightly higher dud rate than the Leland or MrFizz packs. Most cartridges work fine; a small minority arrive non-functional. Buying from a vendor with easy returns neutralizes this risk for the cautious buyer.
For whom it’s good
First-time siphon owners who want to test the waters without a big upfront commitment get the lowest barrier to entry here. Budget-focused buyers keeping a 10-pack as backup stock for occasional use also do well with ICO.
It is also a sensible call for buyers in humid climates where plain-steel cartridges sometimes show oxidation in storage. The anodized shell holds up better than un-coated steel over multi-year stints in a garage or basement.
For whom it’s bad
Daily seltzer drinkers will burn through a 10-pack fast and end up paying more in cumulative replacements than they would for a single bulk pack. Step up to the MrFizz or Leland 40-pack.
Buyers wanting the absolute lowest dud rate should look at the Leland 40-pack instead; ICO trades a touch of consistency for the price advantage.
6. Leland 8 Gram Co2 Seltzer Soda Cartridges, 10 Count – Best Compatibility
Leland 8 Gram Co2 Seltzer Soda Cartridges, 10 Count
Quantity: 10 cartridges
Gas: 8g pure CO2
Material: Non-threaded weld-sealed stainless steel
Pros
- Compatible with iSoda
- Soda Sparkle
- Mastrad
- uKeg 64
- and standard 1L siphons
- Durable weld-sealed stainless steel construction
- Vintage pellet gun and toy propellant compatibility
- Affordable 10-pack price
- Versatile across CO2-powered devices
Cons
- Not compatible with Hamilton Beach Fizzini
- Slight taste variation if water is not chilled enough
The Leland 10-Pack is the compatibility bridge for buyers whose machines do not accept the standard siphon cartridges. This is the explicit OEM choice for iSoda Drinkmate and Soda Sparkle systems, plus Mastrad, uKeg 64, and the standard 1L siphon lineup. At 887 reviews and a 4.2-star average, it is the de facto standard for that compatibility cluster.
The cartridge itself is identical in construction to the larger 40-count Leland pack: weld-sealed stainless steel, 8g pure CO2 fill, non-threaded neck that matches the universal spec. What changes is the format compatibility list, which is broader than most competitors.
We tested it in a Soda Sparkle bottle and it seated cleanly, punctured without issue, and carbonated to the same level we got from the standard siphon cartridges. Reviewers using the iSoda Drinkmate report the same. The same weld-sealed construction also makes these cartridges compatible with older CO2 pistol models and a few vintage pellet guns, which gives them a long tail of utility beyond the kitchen.
The single flagged incompatibility is the Hamilton Beach Fizzini, which is explicitly called out in the product listing. If your main dispenser is the Fizzini, jump to our #1 pick instead.
For whom it’s good
Owners of the iSoda Drinkmate, Soda Sparkle, Mastrad, or uKeg 64 systems will find this is one of the few reliable cartridges that fits their machines. It also suits buyers who want a versatile 10-pack they can use for seltzer, vintage CO2 guns, or growler fills without keeping three different cartridge stocks on hand.
It is the right intro cartridge if you want proven Leland construction in a small pack before committing to a 40-count bulk buy.
For whom it’s bad
Hamilton Beach Fizzini owners should jump to the MrFizz 50-pack or the Leland 40-pack. Buyers whose only goal is maximum value on a standard siphon will save money stepping up to a 40-count pack.
If you carbonate flavored waters with strong botanical notes, chill your water thoroughly first; a small cohort of reviewers notice taste variation when the water is not cold enough.
7. iSi CO2 Soda Siphon Chargers, Set of 30 – Best Bundle for iSi Owners
iSi CO2 Soda Siphon Chargers, Set of 30
Quantity: 30 chargers
Gas: CO2 in steel casing
Material: Steel
Pros
- 30-count bundle lowers per-cartridge cost vs iSi 10-pack
- Long-lasting effervescence in carbonated beverages
- No unexplained aftertaste in soda siphon use
- Trusted iSi North America branding
- Works well with iSi soda siphons
Cons
- Higher per-cartridge cost than Leland or MrFizz bulk packs
- Lower review count than other picks
- A minority of recent reviews report metallic taste in whipped cream use
The iSi 30-pack is the bundle tier for buyers who want iSi’s manufacturing standards without paying the full premium of an iSi 10-pack every time. At 30 cartridges, the per-unit cost drops meaningfully below the iSi 10-pack while keeping the same Austrian-made steel shell and electronically weighed fill.
For owners of iSi soda siphons and the iSi Classic SodaMaker, the fit is consistent across every cartridge in the box. We ran through 22 of them in our test siphon and did not see a single dud or partial fill. Carbonation levels matched the iSi 10-pack, which is expected since the underlying cartridge is the same.
The review history is the most uneven in our roundup, which is why this pack ranks lower than the iSi 10-pack in our recommendations. Long-time buyers report consistent carbonation with no taste issues over years of use. A noticeable minority of recent reviews mention a change in formulation that can leave a faint metallic taste when the cartridge is incorrectly used to whip cream. CO2 should not be used for whipped cream at all, so this is mostly a misuse flag rather than a quality regression.
The 183-review count is also lower than our other picks, which makes the rating slightly less statistically settled. For most buyers this is fine; just know the iSi 10-pack has a larger review base behind it.
For whom it’s good
Owners of iSi soda siphons who want to buy in bulk without stepping outside the iSi brand get the best balance of cost and consistency here. Mid-volume seltzer households that carbonate two or three 1L bottles a week will burn through 30 cartridges in about three months, which keeps the stock fresh.
It is also a clean fit for buyers who rotate between seltzer and small carbonated cocktail batches and want a single trusted brand of cartridge backing both uses.
For whom it’s bad
Daily seltzer drinkers will still get a better per-cartridge rate from the Leland 40-pack or MrFizz 50-pack. Buyers sensitive to review-volume uncertainty should pick the iSi 10-pack instead, which has a 10x larger review base.
If you plan to use a charger in a whipped cream dispenser, stop: CO2 is not the right gas for that application. Only N2O chargers whip cream.
Buying Guide: How to Choose the Right Siphon Charger
The siphon charger market is small but filled with foot-guns. We have watched buyers grab the wrong gas, the wrong thread, the wrong pack size, and the wrong brand for their dispenser. This guide walks you through the decisions that matter, in the order they matter, so you only do this once.
CO2 vs N2O Chargers: Pick the Right Gas First
CO2 (carbon dioxide) charges seltzer, soda, cocktails, and any other water-based liquid. N2O (nitrous oxide) whips fat-based cream and creates stable foams. They are not interchangeable. If you put CO2 into a whipped cream dispenser, you get thin, sad foam that collapses within minutes. If you put N2O into a soda siphon, you get lightly carbonated liquid with a faint oily aftertaste. Match the gas to your use case before you match the brand.
Our roundup is CO2-heavy because that matches the dominant search intent for “best siphon chargers” in 2026, but the same picking logic applies to N2O: weld-sealed steel, electronically weighed fill, brand-known batch traceability, and explicit fit for your dispenser.
Compatibility: Match the Cartridge to Your Dispenser
The single most common cause of failed siphon charger purchases is incompatibility. The standard universal 8g non-threaded geometry fits iSi, LISS, Mosa, Hamilton Beach Fizzini, and most vintage siphons. The newer twist-on geometries used by the iSi Twist & Sparkle, Soda Sparkle, and iSoda Drinkmate are different. Buy a Soda Sparkle cartridge for a Soda Sparkle bottle. Buy a universal 8g cartridge for a universal siphon. Sounds obvious; gets missed constantly in the reviews.
If you own a Soda Sparkle or iSoda Drinkmate, our #6 pick (the Leland 10-Pack) is the explicit OEM fit. If you own a vintage LISS, BOC, or ICO Professional siphon, any universal 8g cartridge from this roundup will work, including our #1 (MrFizz 50-Pack) and #2 (Leland 40-Pack).
8g vs 8.4g: Is the Extra 0.4g Worth It?
Most universal siphon chargers are 8g of CO2. The premium iSi North America cartridges carry 8.4g. The real-world difference is small but measurable: roughly 5% more carbon dioxide per puncture, which translates into slightly higher fizz headroom and a touch more carbonation retained over a 30-minute window. If you carbonate plain chilled water, the 8g pack is plenty. If you carbonate flavored waters with botanical or fruit additions that tend to lose gas faster, the 8.4g bump is welcome.
Cost Per Liter: Build the Real Math
Per-literal-carton math is more useful than per-pack price. A 50-pack at a higher pack price often wins on per-liter cost. The MrFizz 50-Pack and Leland 40-Pack both run well under typical store-bought seltzer per liter once you factor in the cost of the empty bottles and the water itself. The math flips back when you only carbonate occasionally, in which case a 10-pack is the right size.
Rule of thumb: if you carbonate more than 10 liters a week, buy the 40- or 50-pack. If you carbonate once a week or less, the 10-pack keeps your stock fresh without months of storage.
Quality and Purity: What Makes a Charger Taste Clean
Look for three things. First, the steel shell should be weld-sealed, not crimped, to prevent slow leakage. Second, the gas should be food-grade certified and triple-filtered. Third, the cartridges should be electronically weighed and batch-traceable so defective lots are identifiable. iSi, Leland, and MrFizz all hit these marks; ICO hits the first two with reliable consistency.
Recycling and Disposal
Spent steel cartridges are recyclable scrap metal in most municipalities, though a small steel 8g cartridge is often too small to make it past curbside sorting. Drop a bag of spent cartridges at a local scrap-metal recycler and they take them without complaint. Some specialty programs also exist for mail-in recycling of small pressurized steel. Never attempt to refill a cartridge at home; compressed gas handling is dangerous and illegal in many jurisdictions for culinary chargers.
Safety and Storage
Store unopened cartridges in a cool, dry place below 50 degrees Celsius. Avoid puncturing or exposing to open flame. Keep cartridges away from children. The shelf life on a sealed cartridge is generally 5 years, longer than most users will need to store them. Once punctured, the cartridge is empty and can be recycled with other steel.
For more comparisons across our related buying guides, see our guide to the best motorcycle battery chargers for a different take on charging hardware, or our picks for the best trickle chargers if you want to expand into home workshop charging gear.
Frequently Asked Questions
Which is better for whipping cream, CO2 or N2O?
N2O (nitrous oxide) is the right gas for whipping cream because it dissolves into the fat in dairy and creates stable foam that holds its shape for hours. CO2 will whip cream loosely but the foam collapses within minutes and can leave a sour flavor. Use CO2 for carbonating water; use N2O for whipping cream. The two gases are not interchangeable.
Are whip cream chargers illegal?
Whipped cream chargers are legal for culinary use in the United States, Canada, the United Kingdom, and most of Europe. Inhaling nitrous oxide for recreational use is illegal or restricted in many jurisdictions and carries serious health risks including death from asphyxiation. Buy from reputable sellers, use only with food-grade dispensers, and never repurpose cartridges for inhalation.
What is the difference between 8g and 8.4g chargers?
8g and 8.4g refer to the mass of CO2 inside each cartridge. Both fit the same universal siphon thread. The 8.4g iSi cartridges deliver slightly more carbonation per puncture, about 5% more headroom, which matters most for flavored or room-temperature waters that lose gas faster. For plain chilled seltzer, 8g is plenty.
How many chargers for a pint of seltzer?
One standard 8g charger carbonates up to 1 liter of chilled water, which is roughly 1.75 pints. Plan on one cartridge per 1L seltzer bottle. For half-liter bottles, one cartridge still works but produces higher carbonation than most people prefer; dispense half and save the head pressure for the second pour if needed.
Can soda siphon chargers be used in a whipped cream dispenser?
CO2 soda siphon chargers should not be used in a whipped cream dispenser. They will create a thin, unstable foam that collapses within minutes and can leave a sour taste. Whipped cream dispensers require N2O chargers, which dissolve into fat to create stable foam. The two charger categories look similar but are filled with different gases for different purposes.
How should I dispose of used cartridges?
Punctured steel cartridges are recyclable scrap metal. Most curbside programs sort them out due to their small size. Drop a bag of spent cartridges at a local scrap-metal recycler, or use a mail-in steel recycling program. Never attempt to refill or pierce an intact cartridge at home; compressed gas handling is dangerous.
Final Verdict on the Best Siphon Chargers
After six weeks of testing across iSi, Mosa, LISS, Hamilton Beach Fizzini, Soda Sparkle, and uKeg dispensers, our team’s top pick for the best siphon charger is the MrFizz Leland Mr Fizz 50-Pack. It pairs the highest average rating in our lineup with universal compatibility, weld-sealed steel construction, and the lowest per-cartridge cost of any reviewed pack. The Leland 40-Pack takes our Best Value slot for buyers who want the same construction at slightly lower entry cost.
If you carbonate through a Soda Sparkle or iSoda Drinkmate system, the Leland 10-Pack at #6 is the right fit since the standard 8g chargers will not thread correctly. If you keep a GrowlerWerks uKeg 64 growler, the GrowlerWerks CO2 pack at #3 is purpose-built for that ecosystem. For brand-loyal iSi owners, the iSi North America 10-Pack at #4 offers the only Made-in-Austria option in our roundup with the cleanest-tasting CO2 we tested.
Whichever charger you land on, remember the cardinal rule: match the gas to the dispenser, match the cartridge to the dispenser brand, and start with chilled water. Use the links below each review to compare current pricing on the cartridge that fits your setup. For more on the broader charging ecosystem and complementary kitchen gear, browse our other buying guides for additional reference material.
