Instruct: Classify a given review as either positive or negative.
Query: Hot liquids only

I ordered this because of the fabulous reviews but the specs for the mug don't mention that the opening in the top is a hair over an inch wide, i.e. that the big wide black top you see in the picture doesn't come off to clean it....only a smaller inner core of that top. Just discovered that when it came in the mail today. You just keep twisting the opening for drinking further to open and remove the inner cap revealing the tiny opening. I had wanted to use it for cold drinks, putting ice in to chill them initially. Even a small cocktail ice cube doesn't fit in the top. What're you supposed to do, leave the mug in the freezer before every time you want to use it? Even if you use it for coffee, it will be wretched to try to clean. You can't get a cloth/sponge in easily to clean the sides and bottom and the shape prevents your even reaching the sides easily...and I have small hands/fingers. It's going right back tomorrow.