A freezer is the best place for longer term storage, based on my study. A cool dark place is a secondary option.
I recently looked into whether a filled vape cartridge would suffer harm if stored in the freezer. It did not suffer damager, nor could I detect any change in the vape cartridge contents. I did allow the cartridge a couple hours to warm up to room temperature before vaping.
I bought a bunch of two ounce borosilicate glass jars online that I have found useful both for storage and for precipitations.
Borosilicate glass is resistant to damage from both Lye and Naphtha. I removed the 'foam" lid liners, as I don't want naphtha dissolved lid crude in my extract. But otherwise these jars with their lids on never suffer harm from their time in the freezer. Largely on this account, but also because several small jars cool down faster that a single larger vessel (with thicker walls) ,after concentrating my naphtha through evaporation, I put it in those small jars for crystalization These small jars are also easier to keep out of sight in my freezer than a single larger vessel.
Regarding the reuse of Naphtha after the crystals are removed, while I can understand the cost savings of reusing Naphtha, I have not found that the naphtha I pour off post crystalization contains other than very small amounts of product. I came to this conclusion after allowing my "post crystalization" naphtha to evaporate, and examining what remains, on two occasions: a very few yellow drops. Few as in three, most recently, following two grams of crystalization
Has anyone else made investigations regarding this matter?