Health-conscious trendsetters in SoHo may soon be clutching bottles of watermelon juice to quench summer thirst — thanks to a tiny, chic pop-up at 187 Spring St., by the Vesuvio Playground at Spring and Thompson streets that is slated to open May 9.

The 40-square-foot branding shop will offer WTRMLN WTR bottles for purchase and, sometimes, for free, along with private events — “flash fitness” experiences for spinning, yoga and dance throughout the summer season, along with watermelon-flavored treats, from watermelon ginger sorbet to watermelon sashimi and roasted watermelon seeds.

The brand also has Beyonce’s LMN (lemon) flavor, named after her “Lemonade” album.