The whole club will know everytime you drink up from this beer mug. 6 super-bright red, green, and blue LEDs flash in a circular pattern whenever you lift the mug off a table. The flashing goes off automatically when you set the mug down on any surface. Has an on/off switch too to deactivate the pressure sensor when you don't want the effect. The durable clear plastic mug holds 500 ml (16.9 ounces) of your favorite beverage. Hand-washable.