My youngest weaned around 2 1/2.  Subsequently, once in a while he'd ask
and I'd say I didn't have any milk  left, which he accepted.  One day when
he was about 3 I overheard him discussing with his dad that if he poked a
hole in my back and filled me up (like a pitcher, I suppose) then he could
nurse again!  Interesting 3 yo logic.  I promptly offered him a drink from
a cup.  Sincerely, Pat in SNJ