 These were made of transparent Pyroceram (known as Celexium in some regions) with an amber tint.A Cranberry variant was introduced in the early 1990s.Not long after the Corning Consumer Products Company (now known as Corelle Brands) was spun off in 1998, Pyroceram-based Grabits were discontinued in the USA with the close of the Martinsburg, WV plant in the early 2000s.