Flashing Panda LED Freezable Ice Cubes/Rocks, Flash or Steady Glow, Multicolor Color-Changing, 7 Modes - Sold Individually - One Cube Made of non-toxic plastic 1" square blocks that resembles the fanciest of ice cubes The interior contains an FDA approved freezable gel with 3 LED's inside. The total lifespan of the light is a minimum of 12 hours and is easily disposable. To activate, just simply push the button on the bottom of each cube. Eight lighting methods available: Choose between one, two, or all three LED's to work at once!