Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Burns your lips

Pros:Umm, it seals well and doesn't leak.It keeps things hot.Cons:It burns your lips off.I ended up hating it after using it a couple times. No lip on the lid to sip from. So you basically have hot coffee instantly in your mouth. It was like drinking hot magma from a straw or a sport water bottle. Ended up returning it and gettingThermos Stainless King SK1005MB4 16-Ounce Leak-Proof Travel Mug, Midnight Bluewhich has been excellent.