Jugs are a kitchen utensil typically made of plastic, glass metal or ceramic. Their main function is to hold and pour liquids without spillage. They usually have a narrow opening, at the top and a handle on the opposite side for easy pouring!
Glass or plastic jugs with numbers on the side are called measuring jugs. They are particularly useful as you can see the exact quantity of your ingredient. They can be used to measure, liquids or things like flour and sugar. They can be labelled with both the metric and the imperial system of measurement.