John Marsh, writing 40 years ago about Jesus turning water into wine, says:

... and to believe in him is quite evidently not to believe that he can turn water into wine, but rather that he is the true bridegroom, who will replace the inadequate rites of [water] purification established among the Jews with the reality of communion--a marriage--with God acheived through his sacrificial death for all ... Jewish water is anticipation, Christian wine is for all time the reality. The one is but a promise, the other fulfillment...

All this depth of meaning, encased within a sincere act of friendly generosity.