Blister packaging is a type of pre-formed plastic packaging used for small consumer goods, pharmaceuticals, and industrial products. It consists of a thermoformed plastic cavity (the "blister") that holds the product and a backing material (usually cardboard or foil) that seals the item inside. Types of Blister Packaging: 1. Clamshell Blister: Two plastic halves hinged together (common for retail items). 2. Face-Seal Blister: Product is sealed between a card and a clear plastic film. 3. Push-Through Blister: Used for pills; the product is pushed through the backing foil.