The Weird Water artifact in is a special and powerful item unlike any other in the game. You can’t just find it like other artifacts.
Getting it demands you to be in a specific place at a certain time, so you need to be prepared and maybe lucky, too. Its unique way of being discovered makes it different from the typical artifacts you find through exploring or interacting with anomalies.
This artifact has two main benefits and one drawback. First, it provides some resistance to radiation, which is strange for an artifact.
Most artifacts give radiation, so this would help with hunting other artifacts. It also lets you carry an extra 40 kilograms of weight.
The downside is that sometimes your camera will shake a little, like when drunk. This can be frustrating during a gunfight, but it is a very minor downside compared to the bonuses players are given.