Take this handy 48 slot backpack with you while you're out looting
and take advantage of the 36 extra slots of space over the standard 12 slots backpack. This is a LIFETIME
perk, donate to get it once and keep it forever.
Also enjoy the benefit of keeping your backpack contents if you get killed - this is only available with the 48 slot backpack, and only on the PvE servers.
Note that certain items such as firearms, ammo, sulfur, charcoal are blacklisted on PvP servers to prevent an exploit. PvE servers don't have a blacklist.