Water kefir Sherbet berries (Falsa) is a delicious and refreshing beverage made from water kefir grains and fresh sherbet berries. The water kefir grains are added to the sherbet berries juice and left to ferment for a period of time, resulting in a fizzy and slightly tart drink that is packed with probiotics and other beneficial bacteria. The sherbet berries juice adds a tangy flavor to the drink.