Transparent coffee cup Photo by: jkvandersteen What am I looking at? This transparent coffee cup is a perfect physical illusion. The reflection of the saucer in the smooth surface of the cup completes the floral pattern nicely. More optical illusions:Puffy FaceSword-billed HummingbirdFloating Baby BoyBar StoolsFootprint in the sandSkullShadow catThats the cat's pajamas
