While I don't personally recommend doing this (and probably voids any warranty), the issue was the very cheaply made switch.

No issues in the 4 months since purchase & will be very sad if it ever breaks.

The main issue is the odor, once it's ON and got heated a bit, a horrible burning odor emits from the item, covering any other smell in the room, it needs to be turned

There are shine safety issues too

warmer - -I have fairly LARGE coffee mugs - -

It keeps my coffee hot & I like that the light lets me know if it is on or off (for safety).

With this combination it works well, not quite as hot as I like, but close enough

I like my drink HOT and with this cup warmer, if I put a hot cup on the warmer, it stays hot until the cup is empty.

But, if your coffee is new and hot, and you place it on there then yes, this keeps it pretty hot for as long as u have it plugged in 😊👍