Key-Pak, a traditional fold-over, heat-seal blister card, has been protocol tested and approved to be F=1 child-resistant. Easier for older consumers to comply with dosing requirements and errors. “Zipper” design on the back side of the card. Comprised of a single component, which means fewer specifications, inspections, assembly, graphics, engineering and tooling are needed. Compatible with both thermoformed and cold formed blisters.