Bests & Worsts Reviews from Amazon

Thermos generally makes excellent quality, durable products. This mug keeps hot liquids very hot and cold liquids very cold, for a long time. Also, the tab over the drinking hole is detachable so you can clean out the sludge buildup. Most importantly, it has a stainless steel interior. Plastic interiors retain flavors and make drinks taste terrible. Unfortunately, the lid just slides off an on, really easily. So when this wobbly mug tips over, the lid comes out and the coffee follows. If you lie the mug on its side, tie a thread to the lid, and tie the other end of the thread to a centipede, the centipede will have no problem pulling it off. I tested this. After pulling the lid off with ease, the centipede yawned sarcastically. This type of lid is much less costly for them to manufacture. I would have paid a few bucks more for a screw-on lid. Don't waste your money.