grapefruitbubly drops - a fun way to sparkle your water! Make your favorite bubly sparkling water flavors right at home with SodaStream. One 40ml bubly drops ™ bottle makes about 12L* of bubly sparkling water. hi u. the latest way to flavor your sparkling water is dropping on the scene with bubly drops™ Add the drops into your Sodastream fresh sparkling water to create bubly ™ your way, right at home. With a variety of bubly flavors to choose from, the possibilities are endless. Instructions : Add about ¾ teaspoon of bubly drops to a 1L Sodastream bottle of sparkling water. Adjust to taste. Refrigerate after opening. Always fizz before adding any flavor