40 oz. insulated tumbler has a vacuum double wall design which ensures good insulation. No matter which season you are in,you can enjoy your favorite hot and cold drinks for a long time keeping hot drinks hot and cold. The stainless steel tumbler with Lid and flip straw, to prevent leaks. It has a grip shape on the handle so more comfortable to hold. They fit perfectly in you car cup holders, travel backpack, and gym. 40oz large capacity, to help you absorb more water.