These decorative LED ice cubes are battery powered and glow in several colors. They’re not only functional, but also water submersible. This means you can dunk the lot of them into a pitcher filled with water or another beverage, and they’ll still be glowing in multi-colors within the drink. Needless to say, these LED ice cubes are not meant for consumption. If you do swallow one of them, you’ll be glowing from the inside. Please make sure no one swallows it, although you can dunk it into a drink for decorative purposes since they’re food-safe and approved by the FDA. A simple push-button switch will flip the cubes between color modes. You get a set of 12 ice cubes in this set.