Does not always turn on or turn off when it does work it almost burned up a coffee mug

so I guess I'll be looking for another mug warmer.

A flat bottom mug or smaller mug might be better than my mugs for this.

and I was sent a different and very cheap plastic mug warmer

Warm your mug first with hot water.

and I come back to a dried up glump somewhat resembling dehydrated coffee in my favorite mug, but nothing suggesting I almost got a visit from the local fire department.

No mug, but the worst of it is it only worked correctly for about 2 hrs

Oh boy, I finally got a mug warmer