It sort of looks like the bottle has been coated on the inside with oil. Because of the chemical similarities between oil and plastics, oil really sticks to pl

It sort of looks like the bottle has been coated on the inside with oil. Because of the chemical similarities between oil and plastics, oil really sticks to plastic, creating a hard to remove oily coating on plastic surfaces. You really notice this effect if you have the joy of having to hand wash a plastic mixing bowl that has had oil in it. I wonder if something similar is going on here? If they are eating this stuff already is the magic ingredient simply an edible oil? [edit] readability.