Further inside was the RV's toilet. Ever since Hulk had helped transport gasoline, the space freed up here was used for tanks of domestic water. Replenishing water outdoors was quite troublesome. Even though the RV was equipped with two large water tanks, they definitely weren't enough. Throughout the entire migration period, it was impossible to bring enough water for both drinking and general use.
Currently, one of the RV's tanks was for domestic water—used for washing, bathing, and the like—while the other was for filtered drinking water.
Domestic water was replenished using snow from outside. This snow water would first be filtered by the RV's built-in filter and then again by the villa's filter to prevent any parasites from coming into contact with and penetrating the body. It was best not to drink this replenished snow water; it was unsafe, as no one knew what kind of insects would hatch once the intensely cold ice thawed.
