I think serving it in a special glass would be a better idea than limiting the number of pints.
People are used to drinking at a particular pace, when they have a pint glass in front of them. Put a wine glass in front of them and they will drink slower. Ever drink wine from a large glass? Recipe for disaster!
A 33cl stemmed glass would be just enough to remind the drinker that this is not a pint of session strength beer, every time they pick it up.