I would not currently recommend this mug as it is difficult to get it to cooperate. The battery doesn't last a full hour and you can't charge while using it. The temperate is not hot enough when it does work and when you first take it off of the charger, you have to wait several seconds and then pour hot liquid in it. Overall this cup is more of a gimmick than a useful product for a serious coffee drinker. I would return it for a refund, but I don't really have time to mess with shipping it back and I have to pay for the shipping. I may end up regifting it.