Is there any liquid that you can drink that will make an image be unclear in a bottle?

by on October 14, 2012

Q: Is there a way to put liquid in a bottle to make the image in the inside of the bottle bottle unclear?
Then as you drink the liquid, the image in the bottle becomes clear as the liquid is not touching the bottle. I am thinking of how refraction might make this propertty work, but I am not sure how a liquid can refract light to make pictures unclear. Does anyone know the scientific properties in what makes liquid touch to objects image seem blurry? Thank you