Keep Coffee Hot or Cold for Hours: The travel coffee mug is designed with double walled vacuum insulation that keeps your coffee, tea, or any other hot or cold drink at the perfect temperature for longer. It keeps your hot drinks hot for up to 8 hours and your cold drinks cold for up to 6 hours, allowing you to enjoy your favorite drink at any time of the day. Health Material: The inner of our insulated coffee mu is made of 304 stainless steel,which is a high quality and food grade material that ensures your drink stays safe and healthy. and rust resistant.A silicon sleeve covered the thermos to provide a comfortable and slip resistant grip. BPA free and safe for you and the environment. Leakproof and Spill proof: The stainless steel coffee mug come with a screw on sealed lid that ensures your drink won't spill if it's knocked over or stored in a bag. The lid has a tight seal with a sealing ring to prevent leaks and spills, and it is easy to screw on and off. The drink hole on the top makes sipping easy and convenient. Perfect Capacity: Our reusable coffee cup is the perfect size for your daily coffee needs. With a 14oz capacity, it's not too big or too small just the right amount to keep you energized throughout the day. The small and beautiful design makes it easy to carry with you wherever you go, whether you're commuting to work or going on a road trip. It also fits most car cup holders and coffee makers. Easy to wash: The travel coffee thermos design a big opening make It easy to wash. However, we recommend that you hand wash the tumbler only and not use a dishwasher. In addition,do not put into a microwave.