Water activated - simply add water to the glass to activate lights.;Batteries are tough to replace but are indeed replaceable;Lights last for 8 hours - dry thoroughly to maintain battery life;NOT dishwasher safe - handwash only and protect battery compartment underneath

• Light Up Multicolor LED Shot Glass Lite Cubes(Quantity=3)
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Light Up Multicolor LED Shot Glass Lite Cubes(Quantity=3)Litecubes, LLC