Of course you need a great place to keep all those Tiny Whoop 1S batteries! The Rockstar Alchemist Boom Boom Battery Box has you covered. This guy will hold 16 batteries, has a nice hinged lid to keep it all together.
You can store your discharged batteries upside down. The case will accommodate batteries up to 68mm long in the last 3 rows and up to 58mm in the front row (i.e. 205 mAh batteries are 58mm long).
Need something a little larger? Check out the Boom Boom Battery Box. It holds 32 batteries.