Don"t let bath time go down the drain. This cute and clever Buddy drain stop by Umbra covers an open bathtub drain opening and uses water pressure from above to form a seal and prevent water from escaping. Constructed of flexible molded plastic, it measures 3-3/4-inch in diameter by 1-3/4-inch high and works with most standard bathtub drain openings. Designed by Sung Wook Park and Alan Wisniewski for Umbra, the worldwide leader in innovative, modern, casual and affordable design for the home.