VAULT

A vault is a place where you can store items you are not using or want to
save. A vault comes with the purchase of a house or clan hall.  A vault saves
items that are lying in it, as well as items in a bin.  You may have up to 25
items, including bins, lying on the floor of your vault.  Bins hold many more
items, greatly increasing your storage capabilities and bins can be locked or
unlocked by the vault owner.

See Also:  HOUSE, BINS, CONSTRUCT