New high end cocktail: The Reflecting Pool.
1- line your glass with a blue fruit roll up.
Then you're going to need:
2 oz rum
4 oz juice that is kinda yellow (pineapple, mango, orange, lemonade, whatever you like)
1 oz blue curacao (you can adjust for color)
Garnish with lime zest
The yellow and blue liquids make a lovely shade of algae and the rum eventually melts the blue fruit roll up, which is, IMHO, the best part.
Enjoy!