I use my fridge for what I intend to run within 12 months. Long term they go into the tubes of diamond art kits. 60 tubes per kit, good foam sleeves around the tubes, and the whole kit gets wrapped in bubble wrap and vacuum sealed before hiding them in the bottom of my private 5 CF freezer.
I've got some 10 year old chucks in there. After I get my preservations caught up, I'll pull out the oldest ones and grow them out, just to prove my method is sound. Proly early this Winter. I'll post up at that time.