To save space, I dropped a glass 'glass' in a larger plastic glass..... and they seem to be stuck.
What should I do to un--stick them, heat up the glass or plastic and get it a shot or what??
No don't use hot water. use ice cold water it will help shrink the glass bowl. See if you can get some of the cold water to go in between the two bowls. Even a little bit will help get them unstuck. Gentle take a knife and see if you can get a little gap between the two and they should come apart.