Transparent objects like bottles provide great opportunities for putting high chroma colors on a painting. Unlike the opaque objects, the light filtered by the bottle remains high color intensity. In contrast, the light reflected from an opaque object, like the orange, usually gets bleached, and pushing the high chroma color into the area closer to the shadow.... bla, bla, bla.. You know what I mean. I had too much technical junk at work today. My brain has not shifted to the artistic mode yet.