The 40 oz tumbler with handleand straw features triple layer, double wall vacuum insulation technology, keeping your drinks at the perfect temperature, all day long. water cup Cold for up to 30 hours, and hot up to 14hours. The tumbler can be safely placed in most car cup holders, and it is more convenient and lightweight to use with the handle. Whether you're driving to work or running errands, the tapered slim-base design of our insulated coffee mug allows it to fit perfectly in most cupholders. Made of premium 18/8 food grade stainless steel covered with a layer of our durable, yet beautiful powder coat finish. The built-in carry handle makes it easy to take with you wherever you go.The 40oz tumbler with handle feels sturdy in your hand.