Making naturally gut-healthy soda at home is as easy as mixing sugar into water - our Water Kefir Grains will do the rest. One box will make 4+ cups of water kefir every day or two. Add fruit or juice for a refreshing drink that even kids love. Makes batch after batch of water kefir. Vigorous culture: makes water kefir every 24-48 hours. Contains water kefir grains and instructions.