As emergencies go, this is a must have item.
I have a steripen that I can charge from my USB solar charger, but there may come a time when I need water, but have no charge and no sunlight. For this kind of scenario, a manual water cleaning process is a must have. And for that, a water purifier with a long shelf life is definitely the way to go.
These tablet taste horrible, but get the job done, and when you need water, there’s simply no faulting a product like this.
The ones that were sent to me had an expiration date of 2020, and that’s more than enough for me.