Drinking

A character needs one gallon of water per day, or two gallons per day if the weather is hot. A character who drinks only half that much water must succeed on a DC 15 Constitution saving throw or suffer one level of exhaustion at the end of the day. A character with access to even less water automatically suffers one level of exhaustion at the end of the day.
If the character already has one or more levels of exhaustion, the character takes two levels in either case.

Food and Drink

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Item	Cost
Ale (gallon)	2 sp
Ale (mug)	4 cp
Banquet (per person)	10 gp
Bread, loaf	2 cp
Cheese, hunk	1 sp
Meat, chunk	3 sp
Wine, common (pitcher)	2 sp
Wine, fine (bottle)	10 gp