Our LED light up beer mugs make drinking beer even more fun! This clear acrylic beer mug holds 16 ounces of your favorite beverage. The super-bright multicolor LED lights will turn on when you pour liquid into the glass, and the mesmerizing light show will continue on as long as there is liquid in the glass. Batteries: 4, AG-13. Batteries are replaceable, included and installed. Hand wash only. Each box contains 1 LED beer mug.