The top part is the same as the smaller coffee mug oxo makes. This makes it great to drink from, but horrible to pour out of. As others have said the insulation isn't the best either. To me it wasn't a waste of money since I'm just going to use it as a giant mug and I don't need it to stay warm until the evening. Last time I used it, I filled with 200 degree F coffee and at 6:00 am, I didn't use it until 2 pm and when I poured it out it was room temp maybe slightly warm.So used as a large mug, used immediately (or within a few hours) after filling, it's not bad.EDIT (end of Dec 2009):I just threw it out. It doesn't hold heat anymore (about 1 month of use) and there is nothing redeeming abou it anymore.