Our water-activated light-up rainbow 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 fun look for any party theme. Our cubes look great as water decorations in water-based centerpieces, too. Perfect for bars. restaurants and special events, too at any event with any color scheme. Our color morphing LED ice cubes come in a pack of 12 cubes. Batteries are included and installed but cannot be replaced.