I asked this question of a crew and she gave the following story:
A passenger (who had been a bad rash on previous flights) zeroed in on a new FA on CX during the bar service and requested, with a degree of irritation and seriousness, that he be brought a new drink, with the "non-melting" ice cubes. The young lady returned to the galley and asked all of her colleagues where she could find the stuff. The ISM heard about the request,admonished the junior that no such thing existed on board and went out with her to see the pax. The ISM cajoled the pax and invited him for a drink at their destination. There (the excited)pax was met at a bar. A few minutes later before drinks arrived, the ISM went to washrooms, never to return. The pax was then left alone, frustrated and staring at a highball stocked with dry ice....next to which was a note "sorry, it took so long"
[This message has been edited by man in black (edited 14 January 2001).]