Plastic, kids cups are a thing of the past for parents worried about the rise in Bisphenol A and other chemical warnings. Now it's all about stainless steel, and the Safe Sippy has cornered the market. The $15 non-leaching, 11-oz. cup is selling off the shelves. The insulated, dishwasher-safe Kid Basix cup features removable handles, a straw-shaped spout and no-leak valves.