Our 12-pack of Liquid Activated Green LED Ice Cubes do not have the usual on and off buttons but are liquid activated and are solid on. As soon as you place them into a drink of your choice they will light up and create a fun look for any party theme. Our Green Liquid Activated Ice Cubes look great as water decorations in Water-based Centerpieces, too. Perfect for St. Patrick's Day or any time green meets your color scheme. Water-activated light-up cubes stay lit up in solid colors only and are reusable, and may last up to 12 hours. Our Green Liquid Activated LED Ice Cubes come in a pack of 12 cubes. Batteries are included and installed but cannot be replaced.