my little brother is washing the dishes when he calls me over for help. he hands me a mug with a tall glass in it. he claims that while washing the two, he just put (didn't force it) the glass inside the mug and picked it up a little later to find the two stuck fast. the cups were cold when he handed them to me so i suspected that there was some heat expansion and subsequent contraction involved. i tried running both under hot water at first but realized i had to heat the mug and not the glass. i filled the glass with cold water and again tried running the mug under hot. then i tried putting ice in the glass and heating it over a candle, and then putting it on the stove. still no luck. and momma claims these are her two favorite cups, so no breaking one to salvage the other. PICS: pic1 pic2 any ideas?