Always keep at least three days worth of drinking water in your home, a gallon per person per day. So many emergency situations, large or small, can make water unavailable or unsafe. Having filters is also helpful, but you need actual full bottles on hand. For less plastic, go with the big bottles, you can drink from cups. And OP could have washed pits and crotch at least using some of his drinking water, since it’s not citywide so he could buy more on the way home from coffee.