I store some of my most valuable shells in sealed plastic boxes filled with cotton. I have a gem Conus auricomus, and I keep it in a box filled with cotton. I have enough cotton in the box so that when I put on the lid, it pushes the cone into the cotton, thus preventing it from rolling around and breaking. I use a similar method with my Gaza superba, who's box has a blue foam base. For my 3 slit shells, I just use an old lid of a jewelry box, with a pad of cotton in it. The shell rests on the cotton and does not touch the box, so it prevent's Byne's disease. As I mentioned before, my whole collection is artistically arranged on a waxed ceder and redwood bookcase. The front is open, and I often have a fan blowing on the shells, so that would be pretty adequate ventilation, wouldn't you say? Kind Regards, James