UK pints
UK pints are volume units used in the United Kingdom for measuring liquids such as beer and milk. One UK pint is about 0.568 liters.
UK law requires draught beer and cider to be sold in pints, halves or thirds of a pint, and still allows milk in returnable bottles to be sold by the pint.
US oil barrels
A US oil barrel, also known as a petroleum barrel, is a volume unit used in the oil and gas industry to measure crude oil or liquid petroleum gas (LPG). One US oil barrel is 42 US gallons or about 159 liters.