SWIM stores all of his alkaloids/rc's of questionable legality in a waterproof otterbox out in the woods somewhere. Small glass vials (amber), inside of a sealed plastic hardcase works very well imo, And desiccants/oxygen absorbers are a necessity. Stays very close to freezing round these parts in the winter, and in the summer, i just bury it where its almost always 60-70 F during the warmer months.
A very recommended way to store your goods, and protect against persecution in case your abode gets searched for any reason.
Have noticed no degradation, but everything in the box is either fumarate salts, or stable phenethylamines/4-ho triptamine salts. I figure its relatively heat buffered (winter/underground), no uv degradation, and oxygen/moisture absorbers as a second line of defense.
Otterboxes are great for this purpose, and come in many sizes in good prices imo. Also, they're completely waterproof, hell- you could tie one to a rock and throw it in a lake if you wanted.
Swim just loves the idea of a psychedelic time-capsule. And imagines coming back to his hometown years later, digging up his box, and having a good time.