Why won't the carbonating flask close or lock?

Follow the next steps to fix it.

Step 1 - Is your bottle compatible with SodaStream DUO™ Sparkling Water Maker?

The SodaStream DUO™ Sparkling Water Maker can be used with our dishwasher-safe 1L glass bottle and our regular 1L Fuse bottle. The 1L classic bottle, the 0.7L glass bottle (from the SodaStream Crystal™), the 0.5L bottle and My Only Bottle (0.5L) are not compatible.

Check the following compatibility chart:

Step 2 - Is your carbonating bottle properly inserted?

Still having trouble? Contact us via email or phone at 0800-085-8373.