Half-litre carbonating bottles, two to a pack. The handy size — fits a bag, fits a fridge door, fits a kid's hand.

Check the date on the bottle you're using now

Carbonating bottles carry an expiry date stamped near the base, usually three years out. The plastic holds real pressure every time you fizz, so once it's past date, swap it. Most people have never looked.

Details

• Two 0.5L bottles per pack
• Dishwasher safe, top rack only
• Never fill past the line, and never carbonate anything but plain water

Ships anywhere, or pick it up at 1668 1st Avenue.

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