The double-layer vacuum insulated stainless steel coffee mug body ensures its excellent temperature protection performance. Double-Wall vacuum technology to keep drinks hot for around 6 hours and cold for around 9 hours. Double wall tumbler comes with a BPA-free sliding lid for spill-proof and a reusable straw to help you stay neat. The stainless steel tumbler lid is made of ABS, the surface of the travel tumbler lid has a straw hole design, which makes it convenient for you to insert a straw. This 20 oz coffee travel mug is designed for daily use at home, office, outdoor parties and activities. For those who like outdoor activities such as sports, traveling, camping and driving, the sturdy, portable and heat-preserving tumbler can definitely meet your needs. Coffee mug with lid can be safely placed in most car cup holders.