Very well insulated, seems well built so far, very solid. A nice find is the bottom of mug can unscrew to store more coffee grounds to take to work. Works great for coffee & loose leaf tea. Will probably order a few more if it stays solid.
The screw heads dampen the look of an otherwise good looking mug. A plastic cover would really make the look smooth.
On a rare occasion you only want one cup of coffee the press works great.....the mug is well made and the handle fits securely in your hand....most importantly your coffee is hot going to church and it’s still hot after mass