Land of the free, JohniK?

I used to use a tankard at English festivals, as others have said, because the landlords didn't like you walking out of the pub with one of theirs. Tried a glass one but it was too similar, and I didn't go to festivals to irritate landlords.

At one festival I went around with a guy who had a quart tankard (Tez from Coventry Mummers) and we mostly got charged for a pint and a half, not three pints.
I'm more honest nowadays.