I remember years ago when Maggie Thatcher was PM, she gave a science lesson on TV. In it she showed the science of the kitchen and it included making fudge, butterscotch and so on, and she showed the crystal structure at each stage. Butterscotch is a glass, so you beat any crystal structure out of it before letting it set. One of those slightly bizarre things people do that you wouldn't expect, but she was a chemist before she got into politics, apparently.