According to new research, drinking from refillable water bottle can be “many times worse than licking your dog’s toy” in terms of the amount of bacteria it will bring you into contact with.
The website Treadmill Reviews commissioned EmLab P&K to test 12 water bottles of four different types – screw-top, slide-top, squeeze-top, and straw-top. Each water bottle had been used by an athlete for a week without being washed.