Backwash that undesirable last drink in the soda can. We wanted to know if this is a real worry or....not.
One evening, we endeavored to find the truth with a simple test:
First, we would richly color our mouth and saliva with a hearty dose of unsweetened Kool-Aid mix.
Second, we would drink a bit of clear water from a glass. With our bright saliva, it would be easy to see if saliva had made its way back into the drink.
We tore open her first packet of Kool-Aid.
Sure enough the water fell back down the tube(straw), and with it came a little swirl of red backwash.
It dissipated before I could capture it in a photo. There was not much backwash at all. We could hardly wait to spit. Oh yeah and no more sharing drinks!
