Your Water Bottle
If you think that you don’t have to clean your reusable water bottle just because the only thing that ever goes in it is water, think again. Per one 2017 study published in the Annals of Civil and Environmental Engineering, the average water bottle contains as much as 75,000 bacteria counts/mL—and if left dirty, that number can multiply to up to 2 million counts/mL within just one day.
