carnival glass

So called because it was sometimes given as prizes at carnivals and fairgrounds.

carnival glass (uncountable)

1. A type of glassware dating from the early 20th century, notable for lustrous colors.
   • 1983, Ford Times, volume 76, number 4, page 23:

     Consider, for example, the phenomenon of carnival glass. Known also as taffeta glass, it got its more popular name from the fact it was once given away as prizes in carnivals.

• aurora glass, dope glass, iridescent ware, Iridill, poor man's Tiffany, rainbow glass, taffeta glass