Our unique LED Ice Cubes do not have the usual on and off buttons but are liquid activated. So as soon as you place them into a drink of your choice they will light up and create a colorful look for your party theme. Our Liquid Activated Ice Cubes look great as water decorations in water based Centerpieces, too. Liquid activated light cubes are reusable and may last up to 12 hours. Our Liquid Activated LED Ice Cubes come in a pack of 12 cubes. Batteries are included and installed but cannot be replaced.