Pop Rocks achieve their signature popping sensation through tiny pockets of pressurised carbon dioxide gas trapped inside each candy crystal. During manufacturing, the sugar syrup is infused with CO₂ at high pressure. Once the syrup cools and solidifies, the gas becomes sealed within microscopic bubbles. As the candy dissolves in your mouth, the sugar structure breaks apart, releasing the gas with audible snaps and pops.

This rapid release of carbonation creates the fizzing, popping sound and tactile sensation that makes Pop Rocks such a unique and entertaining confectionery experience.