Things You'll Need:
- 1 pound of dry ice for every gallon of water you wish to carbonate. Plastic 2-gallon container with airtight fitted lid Resealable glass or plastic bottles with air-tight lids Seltzer bottle and CO2 cartridges (one cartridge will carbonate approximately 1 quart of water)
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Step 1
Fill a seltzer bottle with water and attach a CO2 cartridge behind the nozzle.
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Step 2
Hold the bottle over a drinking glass or pitcher and press the lever on the seltzer bottle. The gas and water will combine instantly to carbonate your beverage under pressure into the glass or pitcher.
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Step 3
Use dry ice to carbonate water by placing 1 gallon of water in an airtight, resealable plastic container that will hold at least 2 gallons of fluid.
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Step 4
Add 1 pound of dry ice to the water and seal the container.
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Step 5
Place the container outside (to avoid a mess if the lid blows off) and wait approximately 1 hour for the dry ice to dissolve into carbon dioxide, carbonating your gallon of water.
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Step 6
Pour the carbonated water immediately into glass or plastic bottles fitted with airtight lids or screw-on caps.
