Flashing Panda LED Freezable Ice Cubes/Rocks, Flash or Steady Glow, Multicolor Color-Changing, 7 Modes - Sold Individually - One Cube These submersible, freezable LED Ice Cubes make any occasion better! They measure 1.2 inches wide and are made of FDA-approved plastic Powered by 2 nonreplaceable long lasting lithium ion batteries and 2 brilliant LEDs FDA appoved with simple push button operation. Completely safe to use in drinks or decoration. Great for parties, raves, social events and weddings! Average lifespan is 24-36 hours. Batteries non replaceable.