The Leeds Wave Tumbler has a unique wave design sure to catch anyones eye. The Leeds Wave Tumbler is a great morning meeting giveaway. The Wave Tumbler from Leeds has a plastic thumb-slide sipper, and a rubber skid proof bottom. The Leeds 1621-10 is made of stainless steel with a plastic outer decor and a stainless steel liner. The Wave Tumbler has a 12 ounce capacity.