Bests & Worsts Reviews from Amazon

TLDR:This is a non-stick coated mug, you might get the SM-SHE60 SlickSteel version instead. Zojirushi's thermal mugs are really great at keeping drinks hot or cold for longer than any other insulated container I've used. After 6 months of daily use, the non-stick coating inside my SM-SC60HM mug began bubbling up and peeling. Two views with different lighting are attached. The mug has never had anything hotter than boiling water poured in it, was never in a dishwasher, and was never scrubbed with anything abrasive. Zojirushi responded within 24 hours to a request submitted to their support web page. The response is attached as well. They declined to do anything about it, saying that the only thing warranted was the thermal performance, the mug would still function as desired, and that the non-stick coating is safe per the FDA. Safe or not, I'd rather not have pieces of the coating floating around or being swallowed. Zojirushi makes the same mug with their SlickSteel finish, and I'd highly recommend that version over the coated version. My 16-oz SlickSteel mug has been working great for over five years, also in daily use. Cleaning tip: to remove tea and coffee stains, put a teaspoon or two of OxiClean stain remover in the bottom of the mug and pour in boiling water. It will foam up and overflow, please be careful. Let it sit for a few minutes and rinse it out. Mine look like new after that, no scrubbing required. You can take the lid apart and put the pieces in a bowl or jar with OxiClean and pour boiling water over them, sit a few minutes, and rinse, same effect.