I remember leaving mine in my car in the middle of summer. After work, I tried to pick it up, but the metal on the outside was so hot I couldn't. Inside, thou

I remember leaving mine in my car in the middle of summer. After work, I tried to pick it up, but the metal on the outside was so hot I couldn't. Inside, though, the water was cold and there was still ice sloshing around. It really impressed me.