I store mine by rolling them up in Saran Wrap. This way they can be any size or shape you want. After rolling them up I fold the ends over tight fold it in half and put a rubber band around it to secure it. I’ve also rolled it in wax paper so I would have something else to burn using masking tape to keep the roll together and sealed. I would not scuba dive with it but its pretty damp resistant and very light weight.