Anyone own a mug warmer to keep their coffee warm on their desk? Any reviews?

Chasing Curiosity. Empathetic Accelerationist. Founding Fullstack Engineer @icebreaker. YC S16, KB7. 
icbk.me/tayyab.fc

I’ve always wondered the same but I’ve settled on using a good tumblr like a yeti or this one I got from Menottis and it’s just keeps the coffee hot for hours. 

I literally just had a coffee at 1pm that I made and put in the tumblr at 7am and it was still hot (long story why I did this)

https://menottis.com/products/fellow-carter-move-mug-12oz

Co-founder, Scout Game.
https://scoutgame.xyz

Tbh that’s probably that much more practical move. I’m glad I asked now