A British pint is larger than an American pint - 20 as opposed to 16 fluid ounce
s. A British fluid ounce, however, is about 4% smaller than an American fluid ounce. A British fluid ounce of water actually weighs an ounce.
Because of the weights and measures act
the only things you can buy by the pint in Britain now are milk
. The weights and measures act mandated that
items must always be priced by their metric
weight/volume. The act made exceptions for some goods that were traditionally sold in certain sizes - draught beer
being the most notable (Imagine nipping out for a litre
In the interest of having a single standard, the British pint is now defined as a metric measurement, equivalent to 568 ml
1 - However, due to the ever increasing influence of the European free market, it's becoming more and more common to see beer sold in 330, 440 and 500 ml bottles and cans.