I'm imagining if we took a large round steel container, we could raise it high in the air and fill it with water, and if it were large enough, a community with water could have running pressurised water from the contents.

This sounds like a cool idea!

I found plans on a crypto-anarchist list, at https://lists.cpunks.org/pipermail/cypherpunks/2021-December/093065.html , in a thread entitled "build a bomb", for just such a round container.

The rest of the title after "build a bomb", is "out of water". It's a joke, obviously. Sorry if I scared anybody.

So let's build this "bomb" designed by Jim Bell! Specifications for how to make a water tower are not exactly easy to come by. Many communities need pressurised water to drink from.

In his cryptoanarchist plans, Jim Bell describes a spherical steel container with a threaded opening (the "bomb" being "built" out of water).