MTM 10/22 magazine storage case.

[Mahamotorworks]

I just found these exist. Holds Six 10 round mags for the 10/22.  $8ish from Amazon.
https://a.co/d/094SE0rg

Another option is the Pelican 1040 case. It will hold Eight 10 round mags for the 10/22.  $20ish from Amazon
https://a.co/d/0asyattO

Just a few ways to keep magazines organized and together.

MAHA

[Rattlehead]

I just found these exist. Holds Six 10 round mags for the 10/22.  $8ish from Amazon.
https://a.co/d/094SE0rg

Another option is the Pelican 1040 case. It will hold Eight 10 round mags for the 10/22.  $20ish from Amazon
https://a.co/d/0asyattO

Just a few ways to keep magazines organized and together.

MAHA

I have several of the MTM cases and strongly recommend.   

Much easier than loose magazines in use on the range, transporting, storing at home, etc.

[LDB415]

I have 5 of the MTM with all slots filled. Marked them A-E and the mags in them numbered (*)1-6 so if there's a mag problem I'll know if it's B2 or C3 or E5 or whatever. They work great for me.
ETA: The (*) is the letter A-E of the given case.

[Leadslinger66]

I bought the Plano 3600 Stowaway tackle organizer from Academy for about $8. It's not waterproof, but it will hold 18 10/22 magazines.

[Not Sure]

FWIW the Pelican 1040 holds 10 10-round 10/22 mags.

Great organizers either way you go.

[ScottInTX]

The nice thing about the MTM case (despite smaller capacity) is that it fits in the outside pocket of my range bag.  Always nice to have a few spares as loaners for the class.