Great Work
Transparent things are so hard to draw. I tried to draw a crystal vase against a white background... Hardest thing I have ever painted before. It is really challenging because you no longer get to look at color as much as the way light works. You should try doing a crystal vase against a lightly colored background; it is very trying but I doubt that it is beyond you.
My only complaint with the drawing is the composition although I must admit that the dented bottle laying down does add quite a bit to the drawing; I am glad you opted to have two pieces instead of one. Great work overall.