Michael
Petruccelli says: If
you decide to stay at home, fill up the bathtub. An average bathtub full of
water holds enough water for about three days. It also makes it possible to
flush the toilet using a bucket. There are bladders you can buy for the tub to help keep any contaminants out of your drinking water. They are great for hurricanes, natural disasters, or zombie apocalypse. Water bladders come in a variety of sizes so you can take them camping too.