This ceramic jug appears to be able to hold a gallon of liquid and weighs 12 pounds whether full or empty. Sloshing sounds can be heard from within the jug when it is shaken, even if the jug is empty.
You can use an action and name one liquid from the table below to cause the jug to produce the chosen liquid. Afterward, you can uncork the jug as an action and pour that liquid out, up to 2 gallons per minute. The maximum amount of liquid the jug can produce depends on the liquid you named.
Once the jug starts producing a liquid, it can't produce a different one, or more of one that has reached its maximum, until the next dawn.

 

Liquid	Max Amount
Acid	8 ounces
Basic poison	1/2 ounce
Beer	4 gallons
Honey	1 gallon
Mayonnaise	2 gallons
Oil	1 quart
Vinegar	2 gallons
Water, fresh	8 gallons
Water, salt	12 gallons
Wine	1 gallon
Paint	2 gallons
Wisdom Water	2 Quarts
Milk	3 gallons
Ink	1 ounce
Blood	1 gallon
Juice	2 quarts