Batman : The Chalice
Chuck Dixon et John Van Fleet1999

When an enigmatic denizen of Gotham City gives Thomas Wayne's son an old box, it sets in motion a series of events that shake Batman's world.
Suddenly, dark villains including "The Demon's Head" Ra's al Ghul, the Penguin and Catwoman, as well as dozens of mysterious mercenaries are battling to possess the simple drinking bowl now in Batman's hands.

As the battles build to a savage climax and deadly duels between combatants are played out, many questions demand to be answered:
Could this really be the Holy Grail of legend?
Can even its apparently miraculous abilities keep Batman alive long enough to find out?
And what does one do with it if it is the real thing?