CO2 Soda Siphon Chargers 8.4g - Reliable CO2 for Soda Siphons

In this review the iSi CO2 soda siphon chargers are evaluated for home users who want consistent carbonation without fuss. The single biggest reason to consider them is reliable, measured gas delivery: each cartridge is electronically weighed and sealed to give predictable fizz for up to a quart of liquid. For owners of the iSi Classic SodaMaker or iSi stainless steel siphons these recyclable 8.4g chargers offer a straightforward, single-use way to make sparkling water, spritzers, or carbonated cocktails.

Key Features

• Electronically Weighed: Each charger is checked for weight and sealed to ensure consistent carbonation results from batch to batch.
• Exact Gas Measurement: The 8.4 grams of food-grade CO2 is sized to provide reliable fizz for up to 1 quart of liquid, helping avoid under- or over-carbonation.
• Recyclable Construction: Chargers are made from recycled steel and are recyclable after use, reducing waste compared with nonrecyclable alternatives.
• Simple Operation: Inserting the cartridge, attaching it to the siphon, releasing the gas and shaking provides carbonation in seconds with minimal handling.
• Appliance Compatibility: Designed for use with the iSi Classic SodaMaker and iSi stainless steel soda siphon, so owners of those models get intended fit and performance.

Who It's For

The chargers are best for home soda siphon owners who already use iSi Classic SodaMaker or stainless steel siphons and want predictable, single-use CO2 cartridges. They suit people who value measured performance, recyclable materials, and easy, repeatable carbonation for small batches like a quart of sparkling water or mixed drinks.

These are not for users who need refillable cylinders or bulk-party carbonation; also, owners of older non-iSi charger holders should check fit carefully because some customers report compatibility issues with older siphon models.

Pros & Cons

Pros

• Consistent, electronically weighed cartridges deliver repeatable carbonation results.
• Made from recycled steel and recyclable after use, reducing environmental impact.
• Easy and fast to use with a simple insert-attach-release routine that carbonates in seconds.
• Designed to match iSi Classic SodaMaker and stainless steel siphon appliances for intended compatibility.

Cons

• Some customers report fit issues with older iSi charger holders, so older siphon owners should verify compatibility.
• Occasional mixed feedback on taste, with a few users noticing a slightly sour result in certain drinks.

Specifications

Brand	iSi North America
Gas	Food-grade CO2
Net gas per charger	8.4 grams
Quantity	10-count box
Material	Recycled steel, non refillable
Designed for	iSi Classic SodaMaker & iSi stainless steel siphon
Storage	Keep cool, dry, away from sunlight; do not exceed 122 degrees F

Our Verdict

For owners of iSi Classic SodaMaker or iSi stainless steel soda siphons who want predictable, easy-to-use single-use cartridges, these 8.4g CO2 chargers are a solid choice thanks to electronic weighing and recyclable construction. They offer good value if you prioritize consistent carbonation and convenience, though buyers with older non-iSi holders should confirm fit before purchasing.

Frequently Asked Questions

Are these chargers recyclable?
Yes, the cartridges are made from recycled steel and can be recycled after use according to local recycling guidelines.

How much liquid will one charger carbonate?
Each 8.4g cartridge is intended to carbonate up to about 1 quart of liquid for typical sparkling water and mixed drinks.

Will these fit older siphon holders?
They are designed for iSi Classic SodaMaker and iSi stainless steel siphons; several customers reported fit issues with older charger holders, so check your siphon model for compatibility.