The latest after-dinner trick in the US is for the host to throw a crystal wine glass onto the floor where, thanks to the titanium incorporated in the crystal, it bounces but doesn't break. "Unbreakable" tableware is proving popular because it represents a double saving for buyers. In fact, it looks like traditional lead crystal but is much cheaper and, should the worst happen, is far less likely to end up shattered into expensive pieces. All kinds of tableware are now available in "unbreakable" crystal. The wine glasses in the Ultima Silver collection by Mikasa have a stem made to flex in order to avoid breakages. From Shott-Zwiesel come the Diva wine range in Tritan crystal, which derives its strength from titanium and zirconium. Arc have introduced Colour Moods, made of toughened glass but with the appearance of china. It is also cheaper than traditional crystal.