What taste like smooth Tropical Punch and explodes in your mouth? Pop rocks Tropical Punch Popping Candy. Go ahead and "Taste the Explosion!" POP ROCKS are small pieces of hard candy that have been gasified with carbon dioxide under super-atmospheric pressure. When these gasified sugar granules come in contact with moisture, in someone’s mouth or in a liquid, the gas retained inside the carbon dioxide bubbles is released, causing its characteristic popping sensation as well as crackling and fizzing sounds. Gluten Free Nut Free 12/24ct 480 pcs/case UPC: 721874012189 UPC (inner) 721874012196 GTIN: 00721874012202 Made in Spain Item 721009