In a medium container with a lid, gently combine the seedless green grapes, watermelon White Claw, vodka, and lime juice. Let the grapes luxuriate in this spirited bath, ensuring they are fully submerged. Cover and let it rest in the refrigerator for 8 to 24 hours.

Prepare a medium rimmed baking sheet by lining it with parchment paper.

In a shallow bowl, pour in the granulated sugar.

After soaking, employ a strainer to drain excess liquid from the grapes.

Roll each grape—6 to 8 at a time—in the sugar until lavishly coated. Transfer to the prepared sheet pan in a single layer.

Place the sugar-coated grapes into the freezer for at least 2 hours or until completely frozen.

Serve immediately once frozen.