The Thirst-day product from Amazon is one of the Sawyer water filters described in the embedded video below about how to purify water while hiking.
Here’s a doomsday scenario that might motivate you to action. If the money went bad in your nation, a portable filter and outdoor source might be the only safe water when your stored supply is used up.
In that case, unpaid government workers will have something better to do with their time than trying to cater to your needs–they’ll be scavenging food and stuff for their own families. You might have an extended time trying to secure water, power, waste removal of all types, and groceries with your worthless currency. Clean air, shelter from excess heat or cold, and drinking water are your most urgent needs to survive.
Good luck if you live in a desert environment like much of Southern Nevada, USA. Maybe you’d have to drill a well by hand and manually pump from an underground aquifer. That takes some tools and skills beyond most people. Right now, you might want to investigate rainwater catchment and more storage capacity if you have room on your land, while you still have some purchasing power.
Perhaps the easy water for strapped desert dwellers without a functioning market would be squeezing fluid from wild plants. That’s something I’ll look into for a future post.
For now, I’m assuming you have a natural water source within a reasonable travel distance. Of course, fuel is another commodity that would get scarce and water is heavy. No money, more problems. “You won’t be on welfare and heck, there’s no health care.” Maybe getting safe water when there’s no doctor doesn’t seem like such a frivolous activity with the proper paranoia. Here’s a recent YouTube video from Outdoor Adventures titled, “Beginner Backpacking Part 6 – Water Treatment and Storage.”