I'm not sure if there's a regional difference here perhaps, but what volume are the bottles/cans in these 6&12 packs you're both talking about? Sounds like a lot to me whatever it is, but here 500ml is standard (for bottles and cans, draught is pints i.e. 568ml) though 440ml (noticed these recently - 'fridge packs') and 300ml (usually hipster microbrewery stuff, or marketing itself as such) are available.
I don't know why I'm asking really, seems loads even at 300ml. I suppose just to make the point that without specifying it can be read as almost 100% (resp. 50%) off.
Oh, ha. (Also I realised re-reading my comment that I typod/errored in saying 300ml, I meant 330ml. At least for the cans, same as Coke et al., here anyway.)
I don't know why I'm asking really, seems loads even at 300ml. I suppose just to make the point that without specifying it can be read as almost 100% (resp. 50%) off.