You found the Grail! Now, craft the Saint Crappist of Chimay's drink in it.
This is the low-spoiler guide for "Holy Grail Drink" puzzle in Lancelot's Hangover. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.