Published April 12, 2019 14:51 Are your products allergen-free? Although many of our flavors do not contain ingredients with gluten, we cannot certify that each flavor is gluten free. Related articles Are your products gluten-free? Are SodaStream plastic carbonating bottles BPA-free? My sparkling water is not fizzy enough. Help! Are any of your flavors vegan? What is the shelf life of SodaStream's Sparkling Drink Mixes?