Lisa asks:

[I] keep thinking I need to up my drinkable water storage game in case our water supply is compromised, but have also managed to not do this, either. HELP! Suggestions for what to use to store the water? We don't drink soda and I don't want to buy a bunch of 2L bottles to dump. Although they do go on sale for cheap, maybe I should just load up on them.

I just bought a bunch of 2l seltzer and figured that's water.  We also got a straw purifier.

Alice suggests:

... get a couple of the big 5-gallon jugs and a manual pump device to get the water out in an emergency? That's basically what we did–we keep a couple of the big jugs in the basement. The basement is our spot because we're in an area with tornado risk.

It looks like Amazon sells the jugs empty if you want to fill them yourself. You can also buy them already-filled from most grocery/hardware store around here–possibly true where you are? If you do that, there's some sort of $5 off the next exchange if you bring them back, at least here. Recycling built into the system.

Steph says:

Wirecutter has opinions: https://www.nytimes.com/wirecutter/reviews/emergency-preparedness/

I decided it was just easier to buy bottled water on sale or wherever I could find it cheap. It's easier than treating it myself, and will last longer AFAIK. I tend to buy either gallon jugs or multipacks of water. I keep some gallon jugs in the back of the fridge (both to limit space and to act as a thermal reservoir), and freeze some smaller bottles. The smaller bottles in the freezer then become good ice packs for hikes or summer drives.