I like being able to quickly access and find what I need so I can re-seal and refridgerate without condensation or anything, and not having to take out everything. So I got a few tupperwares with rubber gaskets, that has two of these smaller trays inside. I microwave a 1 gram silica bead pack ahead of time and let it cool if i'm going to crack one open, and swap out the silica pack when I do. Usually there's a few grams of seeds total per tupperware, each vial gets silica beads depending on age/shell conditions ....if they are fresh I do 1:1 by weight silica beads. I've always wanted some pelican cases though they are the best!! I do like really squat mason jars that are easy to get into not too deep, for those blood plasma vials and packs I haven't put into amber glass vials. I used to only use mason jars, I would put my centrifuge vials in, take out any gear for projects up to 6 months out and put in a different jar, and use the vaccum seal lids they sell. So if I'm not using amber glass vials, I'll use mason jars.
Vaccum chamber would be cool for longterm seedstocks I wouldn't access for years. Had a dream I was using a refridgerated laminar flow hood for seed storage and access, had a good chuckle.