I wonder how many folks realize what a bathtube will hold (and there’s a toilet near the bathtub in 99% of the homes) when a 100 gallon bladder is filled to the best? I wnder how many folks realize how long thirty or fifty gallons of water heat water will alst in survival mode. or even how to access it properly? I once read that there is approxiamtely 2 1/2 gallons of water in the water pipes of a typical American 1800 square foot house with 2 and 1/2 baths. 9Flushing a toilet by pouring water into the bowl rather than the tank saves about 1 1/2 gallons per flush.]
Buy yourself a Waterbob.