Published September 12, 2018 15:02 How should I store flavors? Before opening store in a cool dry place, refrigerate after opening. Our classic flavors should be kept in a cool dry place also after opening. For further information on storage check the flavor label. Related articles Are your flavors sweetened? What do I do when my carbonating cylinder runs out of CO2? What is the shelf life of SodaStream's Sparkling Drink Mixes? I own an older SodaStream sparkling water maker, can I use your current bottles, carbonators and flavors with my model? Are your products gluten-free?