I got a the 5lb jug of the stuff off Amazon for like $18. I use the Hydrapeak 32oz like many here, 3d printed the vial holders for it, to include the dessiceant tray. Place the vial in the holders, stack in flask, fill the top most tray with the orange bead desiccant, close it up and place in freezer! Regardless of your storage method, if you place in a sealed container in a freezer it's highly recommended you allow it to get to room temp before opening. Condensation may effect the vials if they don't acclimate first.