How do you extend the life of tap water that has been bottled?

In the 1930s through the 1950s, Buckminster Fuller's three prototype Dymaxion houses adopted many techniques to reduce resource use, such as a "fogger" shower head to reduce water use, a packaging toilet, and a vacuum turbine for electric power. While not designed as autonomous per se, Fuller's concern with sustainable and efficient design is congruent with the goal of autonomy, and showed that it was theoretically possible. One of the three prototype Dymaxion houses that Fuller produced was made part of the conventional Graham family residence in Wichita, Kansas, and has now been reconstructed at the Henry Ford Museum.