use food dye to make ice cubes. Then put them in a glass of water-voile. Would be good for a party. Rainbow ice water - Taste the rainbow! - this would be cool for Christmas drinks. Red, green and edible glitter!
rainbow water - for St Patricks Day food coloring in ice cubes. Sparkling water for a healthier version of Sprite. another pinner said you could use kool-aid for the ice cube to change the flavor of the water.