~10 hour light-life on solid colors. Multi-color will have ~4 hour light-life

Logo'd Liquid Activated "Ice Cubes"

$5.00/per cube

It looks like a lit-up ice cube, but actually is a little LED encased in nontoxic coolant gel and clear waterproof plastic. When the cubes are put into any liquid, they light up, and when removed from liquid, they automatically turn off. Sold individually. Batteries are not replaceable.