My party has an extremely "Friar Tuck" cleric of Cayden Cailean so I'm going that way. Particularly because he is playing a practical ascetic. Low wealth, passes off gear to the party, spends most of his time blessing bars and stills and ministering to whoever will listen. His signature trick is the Great Guzzle, wherein he drained a keg onstage to salute and welcome the crowd. Etc.
So. Remaking it heavily including the name...
Grail of the Desperate Reveler
(Same appearance)
Anyone capable of casting Divine spells can use the Grail if their alignment is appropriate for a follower of Cayden Cailean, whether or not they do. By expending a prepared spell or divine font spell, the bearer of the Grail can cause the Grail to fill with enchanted wine. A friendly creature imbibing the wine is subjected to one of the following spells:
Restoration
Neutralize Poison
Remove Disease
Remove Curse
The effect produced by the Grail is heightened to the level of the spell expended. In addition, the enchanted wine is extremely potent; the imbiber consumes a number of doses of alcohol equal to the level of the spell expended and must save versus drunkenness using the caster's spell DC. Regardless of the number of failed saves, drunkenness from the Grail is not lethal; anyone who would die of intoxication from drinking from the Grail is instead unconscious for 1d4 days but suffers no further harm from the Grail.
Typing this while a passenger on a six hour drive. So please comment with critique. I think this should play well into the player's persona and has utility without being too powerful.