Set of 2 Lightweight acrylic shotglass. About 2.5 Inches tall by 2 inches deep. Simple off/ on button on the bottom, 3 Different light show settings. Batteries are included but not easily replaceable. Add some bling to your favorite beverage!. This clear acrylic shotglass doesn't look like much until you push the button on the bottom. Then you have some real spirit with your favorite spirits as the bright led lights flash in 3 different ways. Change the flashing by pushing the button, and when you are done using it, simply push the button until it turns off. The batteries are not replaceable but this will provide hours and hours of flashing fun. This is a perfect set for a Halloween party or any other festive drinking occasion. (Do not put in dishwasher or microwave!)