Earlier this year, in a rare outbreak of common sense, the European Union decided to give the UK an indefinite derogation to allow imperial measures to be used alongside metric ones on consumer products. It’s interesting that we are now seeing a growing number of canned and bottled beers and ciders – even those of a supposedly “Continental” origin – available in a pint (or 568 ml) size. The very popular Magners cider is a good example of this. Producers are recognising that this size actually means something to drinkers and acts as a positive encouragement to choose that particular product. See this page on the website of the British Weights & Measures Association.
Incidentally, I have never understood why for many years (and still to some extent today), 440 ml was the standard can size for beers and ciders. It’s not a convenient round number in either imperial or metric systems, and leaves you feeling that little bit short of a satisfying drink. I always presumed it was something to do with the limitations of canning machinery.