The lids have a tendency to warp at the mouthpiece. I don’t know if it’s from the odd cafe serving coffee above drinkable temperatures or what, but of the 4 I’v

The lids have a tendency to warp at the mouthpiece. I don’t know if it’s from the odd cafe serving coffee above drinkable temperatures or what, but of the 4 I’ve got only one lid is still usable.