It would be pretty nice if we could fill up our bathtubs and sinks with water before the pipeline gets destroyed or something a few months in? Kinda like how you fill up your bathtub to take a bath, or your sink to do the dishes, except you drink from it. I can already imagine filling up the sinks of all the houses i loot. and when i need to, make trips to those houses when the drought comes. It would add so much realism. I would stop praying to the holy rain collector. I'm only thinking like a survivalist in a game about survival.
