We scoured Every Mug and this one stood out!
This mug keeps your coffee hot for hours; even if it is just a couple of shots of espresso.
You can buy this mug here.
Note: The mug also has a lock, so it won't pop open in your backpack, lunchbox, or purse. It holds 8oz, which is small - just right for a few gourmet espresso's, or a nice, hot Cappuchino. Enjoy!