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        Does Backwash Really Happen? | Science-U

        Have you ever caught someone drinking straight out of the milk carton? Does saliva really wash back into the milk carton from your mouth when you take a drink? Test it for yourself using powdered drink powder and see what happens! Try it yourself with step-by-step instructions and guided scientific questions available in the downloadable student handout, or on the Science-U.org website.

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