The Mermaid Water is a bright blue rum punch cocktail with coconut rum, vanilla vodka, pineapple juice and lime juice, plus some Blue Curaçao liqueur for the gorgeous blue color.
Add the lime juice, pineapple juice, coconut rum, vanilla vodka, and Blue Curaçao to a cocktail shaker.
Fill the shaker with ice.
Shake well, about 20 seconds.
Fill your serving glass with ice. If you're using lime slices for garnish, place 2 of the lime slices against the side of the glass in different places.
Strain the drink into the serving glass.
If you have a third lime slice, cut a slit in the side and attach it to the rim of the glass.