Half Full, Half Empty

Half Full, Half Empty is an overseer quest and part of The Wizard of Water multi-stage questline in Fallout Shelter.

Walkthrough
The trail of the "Water Wizard" has led the player's dwellers to a RobCo plant.

On the ground floor, next to the entrance room, is a mole rat broodmother with another mole rat. On the floor below, in the room to the right, is another mole rat broodmother with mole rat. The room left of the elevators has a pair of normal mole rats.

The level above ground floor has a mole rat broodmother with mole rat in the room to the left. The floor above has a pair of radscorpions, a pair of mole rats two rooms to the right, and another mole rat broodmother to the right of that, this time accompanied by two mole rats.

The top floor has a group of three radroaches, and in the next room, there are the two resident humans who will complete the objective. The dwellers are rewarded with random legendary junk. The room to the far left has a pair of radscorpions.

The occupants confirm the wonder-drink is indeed delicious, but seemingly has some hallucinogenic properties. They also claim their brahmin defecated gold bars after drinking some, after which they let it drink all of it. They recommend the dwellers search for more at the nearby Vault-Tec offices.