Bakeware, Tableware, Drinkware and Cookware Design Tada Tumbler by Shanghai Grand Trade Co.,Ltd. Tada is a reusable drinking tumbler designed for use by drivers. The lid shows its open or closed state clearly, so attention can stay on the road. A magnetic closure lets the lid be opened and closed with one hand, and the cup body fits common car cup holders while offering a comfortable grip. The lid and stopper are made of food-grade polypropylene, and the body is made of food-grade stainless steel. The magnetic parts can be taken apart for thorough cleaning. Tada supports the daily use of reusable cups instead of disposable containers.