Trader Joe's just released four new sparkling waters [1], and though we have yet to try them, it'll be no surprise if they end up on our list of the world's best sparkling waters [2]. The naturally flavored one-liter bottles come in Pineapple, Grapefruit, Island Colada, and Cranberry Clementine and only cost $1 each. According to the release, the waters are unsweetened and calorie-free, so don't mind us if we twist open another bottle. Summer may be close to its end, but these CO2-infused spring waters will keep the tropical vacation-y vibes going.