Colorful Crystal Cube Light - Wonderful Gift - from www.feelgift.com

view from http://www.feelgift.com/ice-crystal-cube

It’s white when it’s not open, when it’s open the color changes and flashes, can be used for 12 hours, made of durable plastic, Waterproof and can float on water. This product creates a warm ambiance without flame, wax smoke or mess to clean.
Battery: 2 x button cells (include)
size: 3.4cm * 3.6cm