I wanted to keep my tea hot.  It does not stay any warmer than if I used a Starbucks cup.  My other insulated drinking devices keep drinks hot and warm for hours.  I was not sure this was even insulated for keeping warm until I re read the description.  I thought maybe it was for just to travel in the car.  Disappointing for sure, fortunately it was not expensive so the poor quality did not break the bank.  Bottom line, if you want to keep your drink warm on your desk or for a few hours, forget it, cold as can be.