Pop Rocks Strawberry: Pop Rocks. The candy with history... Introduced in the 1970s in the USA Pop Rocks became so popular it had to be withdrawn due to the short use-by date of the product (or when mixed with carbonated drinks Pop Rocks could cause stomach explosions, who knows!). Anyway, its back and more popping than ever. Parodied in such classics as the Simpsons. Strawberry Flavour.