Pints

Our local Pub serves up our favorite draughts in 20 ounce pints, which I thought was just simply a generous, and certainly well-appreciated, pour.  Then just last week I find that this larger size is the international imperial pint, and based on a 160 ounce imperial gallon, 1/8th is the aforementioned twenty.  An extra 25 percent and the division is easier. Winner, winner...

https://en.wikipedia.org/wiki/Comparison_of_the_imperial_and_US_customary_measurement_systems