All of The Saturday Baby products have a modern style - designed to be both functional and stylish. The Straw Cup has a streamline easy-to-hold design for little hands, and an exclusive lid plug, which means less mess for you, with fewer spills and a tighter fit for the straw. The 100% food-grade silicone material is so easy - just toss in the dishwasher, microwave, freezer or fridge. The Sky is a lovely light dusty blue.