The Stainless Mug is ultra-lightweight and compact. It features a one-piece lid with a seamless structural design, allows for easy cleaning without the need for disassembly. Cute and stylish, it can be taken wherever you go. Stainless steel vacuum insulation keeps beverages hot or cold for hours Leak-proof*, gasket-free, one-piece lid is easy to clean and prevents the loss of parts (*When used properly according to the instruction manual) The twist-off lid makes the drinking experience more like drinking from a regular cup Rounded sip area is smooth and comfortable to the touch when drinking and cleaning A special manufacturing technique was used to make the body ultra-lightweight and compact 1-5/8” (4cm) wide mouth opening accommodates full size ice cubes and is easy to fill Easy-to-clean nonstick coated interior Made of BPA-free plastic and stainless steel