There are perfumery products that do not have any blister (that plastic that usually wraps the package). In fact, many brands are taking them off, including some such as Dolce & Gabbana, Calvin Klein or Elizabeth Arden.
There are also examples such as Hugo Boss where the blister packaging is used to seal 3 bottles when we buy large quantities, so if someone only buys one we have to send it by force without a security seal.