Clamshell boxes are a bit like hard book covers: they are a protective box with a hinged lid that is often used to store high-end products. It has its unique advantages:
it is reusable, and this is quite important for high-end products. Whether it is a photo frame, an album, etc., a clamshell box will protect the product for years if properly taken care of.
It is robust and durable: unlike cardboard boxes, flexible packaging, etc. clamshell boxes are one of the most robust and durable packaging types on the market, and this is quite important for storing more delicate objects.