I wondered what's the appropriate term for the hard plastic cover one so often sees protecting certain products. I took a photo in order to visualise my meaning:
Thank you for your help!
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If the plastic is folded back on itself and then sealed at the edges, you may have a clamshell package. If the plastic is bonded to a piece of cardboard, then it’s a blister package, as mentioned by Jim Mack.
This is often called a blister pack as seen at this Wikipedia page.