The Rambler 20oz Tumbler is built tough to handle any adventure. Crafted from sturdy stainless steel with double-wall vacuum insulation, it keeps your drinks temperature locked in, no matter where you go. Like all Ramblers, this tumbler and its Magslider lid are dishwasher-safe for hassle-free cleaning. The magnetic Magslider adds an extra layer of protection to help keep your drink secure and maintain temperature, though its not leakproof and wont stop spills. Choose the Rambler 20oz for reliable performance on every ride.