1 large cucumber
1/2 shot lime juice
1 tablespoon sugar
2 shots watermelon rum (recommended: Bacardi Grand Melon)
1/2 shot sake
For the Cucumber Shot Glasses:
Combine cucumber flesh with lime juice in a blender. Blend until smooth, about 15 seconds. Pour cucumber puree through a fine mesh strainer, reserving 1/2 cup of cucumber juice. Add sugar and set aside.
Pour watermelon rum and sake into a cocktail shaker filled with ice cubes. Add reserved cucumber juice and shake vigorously. Pour into cucumber shot glasses. Serve immediately.