By far, the most influential element that we (mistakenly) think we must paint is color. A person may spend lots of time trying to find the perfect match for a color. However, color's main job is to develop the emotion of a painting. It also adds atmospheric perspective to a painting. Color alone seldom describes an object very well. The darks and lights or VALUE changes are what does the job of telling us what's going on in a painting, what it's about.
When painting glass, (or brass or any shiny item,) a broad range of colors will work as long as the lights and darks are created in the correct shapes with the correct edges. To give more emphasis to this, I've added some Photoshop enhanced pictures of the above painting.
The first pix has much less value change, with fewer darks and lights, resulting in a flatter painting, showing what happens when there's not enough value change from light to dark. While the jars still may look like canning jars, there is no impact when looking at the painting because the value changes are only strong between the metal handles and the glass. The other three 'paintings' now have crazy color combinations, to show that glass looks like glass if the values and edges are correct, whether the 'color' is correct of not. COLLECTED