When making strawberry syrup for a cocktail, Little Saint beverage manager Natalia Faustino didn't want the leftover, sugary strawberry pulp to go to waste. "I decided to get creative," she says. "I added some spices and fermented the pulp for five days, resulting in a vibrant, tangy kvass." Faustino mixes the lightly fermented beverage with fresh lemon juice and a splash of citrusy tonic water to create this vibrant, zero-proof strawberry drink.