Set of 12 Water Submersible Slow Flashing LED Heart-Shaped Ice Cubes Decorative Multi-Color Rocks by Xcellent Global LD039 Features with Liquid induction function, LED turns on automatically if put into water Can be placed in all kinds of liquid to create a mysterious and romantic atmosphere. Flash automatically.Battery life: 10-20hours Multi-Color Acrylic Ice Cubes Molds for Party Wedding Club Bar Champagne Not recommended for liquids that are to be consumed