I know there have been many threads on how to store coins: 2x2s, flips, albums, boxes etc.
If you're into origami, and want a temporary solution to your 2x2 storage, I think with thick enough stock paper, this could work quite well.
https://www.youtube.com/watch?v=Fys3YwcuLag
Just tried it with an A4 page (210mmx297mm, 8.3"x11.7") and it worked quite well.
May need to trim a little off the long edge to get the width closer to 8".
But quite pleased with the result, especially for temporary storage of 2x2s.
If you make one with trimmed card and one untrimmed, may even be able to make a lid?
These kind of boxes tend to be quite expensive in the UK, so I'm always looking for cheaper options.