If you were to manufacture and sell a new protective case for spectacles what material would you use and what market would you aim for and what processes would you use for manufacture?

If you were to manufacture and sell a new protective case for spectacles what material would you use and what market would you aim for and what processes would you use for manufacture?
Hard vacuum molded plastic with hinged locking lid similar to pelican cases. Thats what I use instead of the case that came with my glasses