When consumers choose to refill and reuse convenience-size plastic bottles, should they be concerned about potentially harmful bacteria?
Not if they clean their plastic bottles between uses just as they would other drinking containers. Plastics are by nature extremely sanitary materials, and plastic bottles are no more likely to harbor bacteria than other kinds of packaging or drinking containers. Bacteria thrive in warm, moist environments. Once bacteria have been introduced, virtually any drinking container (coffee mugs, drinking glasses, serving pitchers, etc.) becomes a suitable environment for bacterial growth.
Consumers should clean any drinking container with hot soapy water and dry thoroughly between uses. Bottles specifically designed for extended reuse are often made with wide openings that allow consumers to use cleaning instruments and easily dry them.