Quick answer
Press a SodaStream twin pack cap onto your carbonating bottle until it clicks, then store the bottle upright in the fridge. The hermetic seal keeps your sparkling water fizzy for up to two weeks.
Why use a dedicated cap instead of the original screw cap
SodaStream twin pack caps are designed specifically for carbonating bottles. Their hermetic seal prevents gas from escaping, which a standard bottle cap cannot guarantee. This means your sparkling water stays crisp and bubbly longer—up to two weeks in the fridge if left unopened.
Twin pack vs. single cap: what you get
Each twin pack includes two identical caps, so you always have a spare. This is handy if you carbonate multiple bottles at once or if one cap gets misplaced. The caps work with all SodaStream carbonating bottles, including glass and plastic models.
Step-by-step: Installing SodaStream bottle caps
- 1. Carbonate your water: Fill your SodaStream carbonating bottle with cold water, attach it to the machine, and carbonate to your preferred fizz level. Remove the bottle from the machine. Do not overfill—leave about an inch of headspace so the cap can seal properly.
- 2. Align the cap: Take one cap from the twin pack and place it squarely on top of the bottle opening. Make sure the cap is centered and not tilted. A tilted cap may not seal fully, letting carbonation escape over time.
- 3. Press down firmly until it clicks: Press the cap straight down with even pressure until you hear a click. This indicates the cap has locked into place and formed a hermetic seal. If you don't hear a click, the cap may not be seated. Remove and try again.
- 4. Store upright in the fridge: Place the capped bottle upright in the refrigerator. The seal works best when the bottle is not tipped on its side for long periods. Store away from the door to avoid temperature fluctuations that can affect carbonation.
- 5. Remove and reuse: When you're ready to drink, pull the cap off with a gentle upward motion. Rinse the cap with warm water and let it air dry before reusing. Hand wash only; dishwashers may warp the cap and break the seal.
Product facts
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Sodastream Bottle Caps Twin Pack White: The twin pack creates a hermetic seal that keeps sparkling water carbonated for up to two weeks in the fridge if left unopened. You can carbonate several bottles ahead of time and enjoy fresh fizz throughout the week without rushing to finish a single bottle.
Sodastream Bottle Caps Twin Pack White
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Sodastream Bottle Caps Twin Pack Black: Sold as a twin pack for more sparkle power, with a hermetic seal that keeps water fizzy for up to two weeks. Having two caps means you never have to wait for a bottle to empty before carbonating the next one.
Sodastream Bottle Caps Twin Pack Black
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Sodastream Glass Bottle Caps Twin Pack Black: Designed for carbonating bottles, these caps create a hermetic seal that keeps sparkling water fizzy for up to two weeks. Glass bottle users get the same long-lasting seal as plastic bottle users, so you can choose your preferred material without losing fizz.
