Travel Mug ECO is a 0.36-liter thermos mug, made of 90% recycled stainless steel. Keeping drinks hot for up to 4 hours and cold for up to 8 hours, it is perfect for on-the-go and desk use. This model features a new improved twist cap with a button on the top for easy opening and drinking. The cap is completely leak-proof, so you don't have to worry about spills in your bag. Additionally, the thermos cup fits perfectly in a car cup holder. It is dishwasher safe and easy to clean, as the cap can be easily disassembled into two parts for thorough cleaning. 90% of the material is recycled stainless steel Completely leak-proof