Most efficient way I could think to store the number tokens for Catan, using the incredible Gridfinity system. 

The bin is a 3x3x4 bin with no label, but it does have a lip so you can stack other bins on top. 

The bin fits 54 number tokens, which admittedly is more than you should never need this many tokens, but I like to have extras on hand just in case.

My print settings weren't super refined, so the inlayed numbers didn't come out super well, so please remix or upload your profiles if you improve upon what I have!