The perfect (potentially terrifying) pairing for radioactive dinnerware? Uranium-tainted glassware. Since the early 19th century and up until the 1970s, glassmakers widely used uranium to color glasses a transparent yellow or yellow-green. The glassware was often referred to as canary glass or Vaseline glass, and had a tendency to emit low levels of radiation for many years after being manufactured. To see if your old glassware possibly contains uranium, hold it up to a black light in a dark room. If the glass glows a greenish color, you might want to start sipping from something else.