I dry vape, so I'm also planning on getting 5 ml jars to store ground bud in. ~4 of those inside of a Pelican 1050 Micro Case (already have this, might be better options if I didn't), in with my vape and other supplies.
If a humidity pack inside of the Pelican would help, I think it's about 1 L empty volume.
This has inspired me. My Instant Pot has been throwing a lot of errors lately, I bet I can rig something up...