The double-walled stainless steel mug keeps beverages hot for up to 4 hours and cold for up to 8 hours. You can smell the aroma of coffee or the scent of your favorite tea as soon as you remove the lid. You can drink straight from the rim, just like you would from your favorite mug at home. This leakproof mug is available in two sizes, 375 ml or 475 ml, and fits in nearly all cup holders. After use, the mug is easy to open and disassemble for thorough cleaning. Enjoy hot or cold drinks on the go with a mug that is durable and environmentally friendly.