San Juan Seltzery features food from Ethan Stowell and all-natural, alcoholic sparkling waters that are refreshing, delicious and the lowest calories on the market. San Juan Seltzer transforms everyday occasions into spirited ones. We provide the cleanest tasting, all-natural, alcoholic sparkling waters that are refreshing delicious and the lowest calories on the market. Each gluten-free flavor contains zero sugar, zero carbs and is inspired exclusively by Pacific Northwest fruit flavors that are blessed by our founder, Katy Enger, and CEO Ron Lloyd.