Storing coins in capsules

Dear friends, I have put every coin in my collection in a capsule. Now I store it in a polypropylene plastic box. However, I would like to "upgrade" this setup and want something better. I don´t want to spend big money on a fancy coin cases. I have been thinking about a glass box (because it looks nice and fresh), although most of them have some screwing mechanisms made of unknown plastics (I don´t want to risk it). Have you got any other ideas, please? Thank you!! 😀