Those 'Bottles Saved' Counters on Water Filling Stations Are Way Off. Does It Matter?Many factors—from the size of your bottle to the age of the filter—can contribute to the count being wildly inaccurate. But even bad math shows that we're using fewer plastic bottles.
Source: Those 'Bottles Saved' Counters on Water Filling Stations Are Way Off. Does It Matter? (https://www.wired.com/story/bottles-saved-counters-on-elkay-water-filling-stations-inaccurate/)