This vintage Hungarian enamel jug can be used to hold either oil or water. To use it, simply pour your desired liquid into the 10 - cm diameter opening. When cleaning, use a mild detergent and a soft cloth to avoid scratching the enamel. Don't soak it for too long as it might damage the enamel. Store it in a dry place away from direct sunlight to keep its vintage charm intact. And remember, since it's a vintage item, handle it gently to prevent any chips or cracks.