“Burn your mouth hot (and cold!)”

“Haven't had the same issues that other's are claiming... The screw-on lid is secure, to say the least, and the push-button sip valve seems to work just fine. Also, pretty tough. Already dropped in the parking lot a few times, no damage. The greatest feature - heat retention is excellent. Here's an example, made tea (at altitude, so, lower boiling point), drove two hours, drank 1/2 of it, skied all day, it was still warm (not hot) when I got back in the car. Would have given it 5 stars, but the lid assembly can get really tight (also means good seal though), and it can be a little tough to get off if tightened too much. Have two, looking to buy more.”