Warheads is a brand of sour candy that was invented in Taiwan in 1975, and was first imported to the U.S. by The Foreign Candy Company in the early 90s. For a while, special "HOT" versions of the candy were also available but proved to be less popular. Impact Confections acquired the brand in 2004, and they're currently manufactured and distributed in the U.S. They proved to be in high demand, especially with children. 

Warheads Extreme Sour Hard Candy derive their strong sour flavor primarily from malic acid, which coats the outside of the small, hard candies. The intense sour flavor fades after about 5 to 10 seconds, leaving a fairly mild candy that contains the much less sour ascorbic acid and citric acid, all probably wonderful for tooth enamel.

The name "Warheads" comes from the notion that the sour taste of the candies is like a real warhead going off in your mouth, and the brand's mascot, Wally Warheads, is depicted as a boy with puckered lips and a small mushroom cloud emanating from the top of his head. A driving force behind the candy's popularity were informal competitions among schoolchildren to determine who could withstand eating the largest number of Warheads at once.

They've recently expanded the brand to include a sour gummy belt, a lollipop/sour powder dipping candy, sour liquid drops and a sour spray candy.