Ah, I see. So 'myself and a colleague had 5 330ml Stella Artois for the princely sum of 20 Euros. So 2 euros for a third of a litre.' Should have read 'myself and a colleague each had 5 x 330ml Stella Artois for the princely sum of 20 Euros. So 2 euros for a third of a litre.' Which would have made more sense.
Lettuce see...
€20 = £17.10 / 10 = £1.71 per can/bottle with seems okay I suppose, except its Stella Artois which I'm not overly fussed about.
Okay, carry on.