�VACUUM INSULATION】- IDEUS 16 oz coffee tumbler is made from 18/8 stainless steel. Advanced double-wall vacuum insulation technology can keep the temperature of beverages for up to 6 hours (hot) & 12 hours (cold). �HEALTHY MATERIAL】- The insulated coffee cup is with premium 304 food-grade stainless steel inside, rust-free, odorless, lead-free. The lid was made of food-grade silicone, BPA-free, guaranteed high durability. �STYLISH AND DURABLE】- The thermal cup is dishwasher safe and has a No Sweat Design to make sure your hands stay dry. The tough powder coating on the colored tumblers won’t fade, peel, or crack through extended field use. �PERFECT CAPACITY】- This travel mug has a 16oz capacity. Its wide mouth makes it perfect for infusing drinks with fruit or ice and for effortless cleaning. Ergonomic handle on the side for a comfortable grip, making it the great outdoor camping mug and the coffee mug in the office as well. �PRESS-IN LID】- Silica gasket seals to achieve maximum spillproof capability. Drinking hole on the top, with a splash-proof sliding cover. Please note it is to keep drinks contained and prevent heat/cold from escaping. It is not leakproof.