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Blister packaging is a type of rigid plastic packaging that is commonly used for pharmaceuticals, electronics, and small consumer goods. It consists of a pre-formed plastic cavity or "bubble" on one side, and a backing material on the other. The cavity is designed to hold a specific product, and the backing material seals it in place. Common backing materials include foil, paperboard, or plastic film.

The blister is typically formed by thermoforming, where a plastic sheet is heated and then drawn over a mold to create the cavity. This cavity is then filled with the product, and the backing material is applied and sealed, often through heat or adhesive. The transparency of the plastic bubble allows consumers to see the product inside, which can be beneficial for marketing and quality control.

Blister packaging offers several advantages. It provides good protection for the product against environmental factors such as moisture, dust, and tampering. The individual compartments can also help to ensure that the correct dosage of medication is dispensed or that small items are not lost. It is also relatively inexpensive to produce, making it a cost-effective packaging solution.

However, blister packaging can also present challenges. It is often difficult to open, particularly for individuals with limited dexterity, and the plastic and foil components can be difficult to recycle. The environmental impact of single-use plastic is also a growing concern. Despite these drawbacks, blister packaging remains a widely used and versatile packaging format across many industries.