Hey everyone, I was recently at Tokyo DL and I bought a clear (glass probably) mug with a "I (mickey mouse head) MK" logo on it. I am dumb and threw away the warning label, but it had a symbol on the bottom that showed basically steam lines coming out of a cup with a line through it. Does this mean it cannot hold hot liquids? This seems kind of odd for a mug, would make more sense if it said no boiling liquids or something. I am not really sure how to follow these, if anyone knows what they mean your help would be greatly appreciated. Thanks!