HotSmart Keep Hot Mug Patented

This mug is quite heavy for someone who has little strength in their hands/arms. The contents do stay hot on the bottom,but with no lid, the contents quickly cool off.

It didn't keep the coffee hot long enough. The seller stated that it would keep it hot longer than that.

This mug does not keep the coffee hot any longer than my regular coffee mug.

The cup was heavy, the instructions were confussing. The bottom line is my coffee did not stay hot/warm but the outside bottom would remove the finish of a fine table is coaster not used. Not worth all the prep microwave process for the end result!

Yes, this really works. Heat the cup up in the microwave, pour in hot coffee, and it stays hot. No, it will not stay hot forever, but it does stay hot longer than any other porcelain mug.I've been using this mug for over a year now, and it's performed well. I'm buying a second mug now, because my wife, exclaiming "wow, this really works", has stolen mine.Note to inventor: We also have a HotSmart plate that has seen a lot of use. I'd love to see some HotSmart serving platters.

Doesn't keep the coffee very warm for long

My wife has only used this cup about 5 times and has already noticed two cracks in the base. We also ordered the plate which seems to work better than the mug at keeping things warm!

Save your money. I think the designer needs to go back to the drawing board with this one. I bought two for my parents, both cracked after one use. Very bottom heavy. Coffee didn't stay any hotter and you can't put it in the microwave to warm up whats left in the cup.