First the cup is top heavy.The real problem is it takes for ever to get hot.I thought it was so you set the heat and would be done. No-- you have to keep pushing a button to the heat you want, but when it reaches say lukewarm and you want hot it resets itself to lukwarm, then you have to push again to reset again and again to get to hot. Not to good while driving in LA traffic..I just made a 250 mile trip in my car and my cup never went more than lukewarm but one time to Hot. Problem is I stopped to gas up and it reset itself to Room Temp. Finally threw out the coffee and bought a cup togo..