Add a blast of bright light to your favorite cocktail with this LED Square Bottom10 oz Rocks Glass. Our crystal clear acrylic Rocks Glass features bright LEDs in the base that are accented with a prism bottom to create a super cool light show with each drink served. Our LED Square Bottom Rocks Glass features 3 distinct light modes: slow flash, fast flash & steady on. Each light up cup is illuminated by red, green & blue LED's. Perfect for serving up signature drinks at bars and restaurants, and for anniversaries, birthdays, grand openings or marketing your brand! Each 10 oz. Square Bottom LED Rocks Glass comes with (3) AG13 batteries included, installed & replaceable. Hand wash only. Not microwave or dishwasher safe. Cheers!