Description Quality travel mugs are a must have.  No matter if you’re using the Miir Travel Tumbler on your daily commute, or on an epic adventure, these mugs are built to perform.  The double-walled medical grade stainless steel, plus leak-free lid keeps your beverage hot or cold for hours.  Designed to fit in your cup holder, these BPA free travel tumblers are easy to clean in your kitchen or campsite.