>>https://twitter.com/kathygriffin/status/1222420322764279808?s=20
one of the comments countered with this
aquatabs.com/home/about-aquatabs/
https://aquamira.com/product/aquamira-water-treatment-drops-1-oz/
https://katadyn.com/us/us/403-8014996-micropur-mp1-20-usa-only
https://msrgear.com/water-treatment/filters-and-purifiers/se200-community-chlorine-maker/10275.html
https://cdc.gov/healthywater/drinking/public/chlorine-disinfection.html
https://www.who.int/water_sanitation_health/water-quality/guidelines/chemicals/chlorine-dioxide-chlorite-chlorate-background-jan17.pdf