How do you get your water?

For making bottles. I use distilled or purified water and I have it delivered from the store (6 One gallon bottles at a time) but it doesn't last long.

I am also living in an apartment building and I hate hauling the bottles up every few days

I feel like I am missing something

Is there like a water delivery service, or a machine that purifies water or something?

What does everyone do?