By purchasing the Tappwater filter (and not purchasing plastic bottle), one person saves 800 plastic bottles a year from entering the landfill (or ocean, or rivers). This helps to protect wildlife from consuming more plastics.
Currently, the average person consume 40 lbs of micro-plastic in their lifetime. Tappwater filters reduce plastic pollution (which means less plastic ends up in our systems) AND by drinking less water out of plastic you are reducing the amount of micro-plastics in your own system. Micro-plastics leech into the water held by plastic bottles, particularly in warm weather. Tappwater filters out micro-plastics from tap water as well.
8% of the world's oil production goes to producing plastic bottles for water consumption. By consuming less plastic waste, you are reducing your environmental footprint as well.