I placed the lights under the glass to see how the etching looks. This lights up the etching even better than expected, making it eye-catching and showing all the details. Due to how well the text works I know it will work great for the illustration as well.

With Liquid in the glass the lighting also works well and you have the reflections from the liquid making interesting patterns and the lighting highlighting the etching. Having the four different coloured lights will make the individual illustrations on the bottles stand out beautifully in contrast with each other.