White LED Light up ice cubes with Push Button on/off. Push Button cubes last longer and work in ice, unlike cubes with moisture sensors (which only work when submerged in liquid). When on, the bright color operates in 3 modes: slow flash, fast flash, and steady on. When off, cubes are clear. FDA approved clear acrylic shell is sealed with freezable gel inside and is submersible safe in beverages. They are fun LED party lights that when mixed in with ice in the Party Barge, the light cubes provide a very nice light effect and help provide visibility. They can also be used in drinks. And if you're having trouble getting your little ones to take a bath, throw a few in the tub for fun illumination.