I love it!! It is the perfect size, keeps drinks hot for hours and you can't even feel it, the outside stays cool so you don't have to worry about burning your hand as you pick it up for a drink. I recommend filling it just to the edge just below the threads to the lid, it's always perfect! I fill it with water then dump that in my kettle to make the perfect amount of tea!

These tumblers are great at keeping coffee warm. And my wife loves the cat!