From the SRD
"CASTING
Casting Time 1 standard action
Components V, S, M (a single grape)
EFFECT
Range 10 ft.
Target 1 cu. ft./2 levels of liquid (see text)
Duration 10 minutes/level
Saving Throw Will negates (object); Spell Resistance yes (object)
DESCRIPTION
This spell turns nonmagic liquids—including spoiled, rotten, diseased, poisonous, or otherwise contaminated drinks, tears, seawater, and similar fluids—into mead or wine of average quality. This spell does not prevent subsequent natural decay or spoilage.
Unholy water and similar liquids of significance are spoiled by tears to wine, but the spell has no effect on creatures of any type or on magic potions.
Creatures that drink the mead or wine created by this spell become sharp-witted and clear-minded, gaining a +2 enhancement bonus on all Intelligence- and Wisdom-based skill checks. This increases to a +5 bonus at caster level 9th, and to +10 (the maximum) at caster level 15th.?
Duration 10 minutes/ level what does that affect?
Does the liquid revert back to a normal state after that time(back to spoiled water or whatever)
If so, how does that affect someone consuming spoiled liquids as digestion takes a considerable time?
Or does the duration only impact the bonus effects when consumed? If so how long does the liquid remain in this magical state?
I'm dming a game, I have an alchemist that wants to use this, after looking at it for a while my general conclusion is that after the duration the liquid loses its magical properties, but remains as whatever alcohol chosen at least for a day(similar to create water or enhance water).