Travel mugs are made of 304 stainless steel. Ensure your cups unbreakable, rust resistant, Non-toxic and harmless. The lid is made of ABS, chemical-free. Wide mouth design and Drink hole on the top for easy washing. The double-layer vacuum design is to prevent condensation/burning sensation at the temperature of the beverage and has a very good insulation effect. 20oz travel Mug lightweight and compact feel make it easy to fit into most car cup holders. 3 15/32" W x 6 13/16" H