This Slate column on bloatware is rightfully getting scathed everywhere . The tone of the Slate piece hearkens back to the movie Wall Street . Bloat, for lack of a better word, is good. Bloat is right. A good designer does not simply do what their customers tell them to do.
Good designers study their customers to see what they actually do, and design features from there.
The magic of the internet working for me. Heat conduction across a vacuum is very poor, so hot things stay hot and cold things stay cold. But, whenever you pour something hot into a cold surface, the surface expands. This creates little areas of stress when the coffee hits the thermos. It's just possible that the surface might crack.