Firewater

The water smells and tastes as normal, but it has the poisonous qualities of fermented cactus milk.

You give water the intoxicating properties of brewed spirits, such as wine or broy. A cup of this water acts as a poison (the Fortitude save DC is equal save DC this spell would have) that deals no initial damage, and 1 point of Wisdom damage and 1 point of Dexterity damage, as secondary damage. Detect poison positively detects firewater, but the water tastes and smells like normal water.