Flipping my lids
I protect my fly tying materials from not only insects but rodents by the simple expedient of storing them in GI 50-cal. ammo boxes. Their clamp-down lids would probably repell a wolverine. Four of them hold most of my vulnerable materials, labeled Loose Feathers, Feathers on Skins, Pelts, and Body-Tinsels. These cans can often be bought from war-surplus dealers for $4-$5 apiece.