Wacky Packages are a series of humorous trading cards featuring parodies of consumer products. The cards were produced by Topps beginning in 1967, usually in a sticker format. There were 16 series produced between 1967 and 1977, with some reprints and several new series released up to the present day. At the height of their popularity in 1973–1974, Wacky Packages outsold baseball cards, when they were by far the most sold trading card items in the United States.