Recently, products in the electronics and automotive industries use a Virtuweld folded blister package. It has seven spot sizes. The blisters appear to be welded but actually suck together to form an invisible seal while still having all the benefits of unsealing. This blister pack can be manufactured using various types of PET and PVC materials.
Source: Packaging Materials and Containers
DELIN HAIR COSMETICS , https://www.arganshampoofactory.com