Guaranteed to make your morning coffee a real gas, this amusing mug makes its own startlingly realistic fart sounds! Motion activated to let out one of seven different gassy sound effects each time you pick it up. Sound chip with on/off switch is inside base and is removable before washing. Includes 3 button cell batteries. Ceramic. Holds 11 oz. 4 1/2"L x 3 1/4"W x 3 3/4"H.