a water skin

This is a piece of thin leather which has been shaped and sewn tightly so as to hold over a quart of water. It can be filled or drunk from using an opening which can be drawn shut and fastened with a lace.

It is a water skin.
It weighs five pounds.

You identify a water skin.
It is a drink container.
It contains water, contaminated with level zero null that would last for zero hours.
It weighs four pounds and twelve ounces, and it is worth about twenty busc.
Its keywords are skin and waterskin.