Backwash
![girl holding a bottle with green liquid](https://wpsu.psu.edu/wp-content/uploads/2021/11/experiment-backwash.jpeg)
Does saliva really wash back into the milk carton from your mouth when you take a drink? Test it for yourself using powdered drink mix and see what happens!
Does saliva really wash back into the milk carton from your mouth when you take a drink? Test it for yourself using powdered drink mix and see what happens!