Mystery Fluid

It stands on the counter casting a shimmer on the adjacent wall where it refracts a beam from one of the studio lights. The diet pepsi bottle's contents, once brackish and near opaque, have obviously been replaced with a hydrophanic subsitute. What is this mystery fluid? Its tinge of saffron belies any thought that this be water. Apple juice? Perhaps rain water from the gutter? Tell me Tim did not pee in that bottle. ... Again, tell me please that this is NOT the product of Tim's micturation. Crap.