8 * 20L containers of tapwater with Katadyn silver based purifiers added to keep it potable and save me from having to keep switching it. These ones are kept in a dark cool spot.
4 x 10L containers of spring water.
Katadyn water filter - I forgot the name, but its the bigger one that goes on for ever
Can filter about 50,000L of water from a cleanish river.
I also have some chorine and iodine based purifiers for more challenging mobile and bug out scenarios.