After his passing, Shamuel left this waterskin to his nephew. Over the next couple decades, its wherabouts were lost to the number of adventurers that sought this amazing piece of Waterdeep history.
This waterskin seems like a normal waterskin save for the Atoms' family crest emblazoned on the end of it. Any inspection of the item will reveal that it is beautifully crafted, each stitch carefully woven with the hair of a female Dwarf's beard. The skin from which the item is made is that of a vervet monkey, known for its frequency of alcohol consumption.
Filling this waterskin with water, of which it holds 2 liters, will activate its magic. After the water has rested for eight hours, the contents will change to become one of the following: \columnbreak
When the liquid is poured out, it remains imbued with magic for eight hours. There will be one liter, or enough for four people. If a target wishes to oppose the effects of the liquid, they must make a Constitution saving throw. If the target is not aware of the magical nature of the liquid, this save is made at disadvantage. If they have ever been the target before, the save is made at advantage. A successful save vs. DC 12 will nullify the effects completely. The skin can only be used once per day.