We like entry #5 and #6 because of the brightness of the colors against both black and white, and the overall simplicity. The logos are simple and colorful and relate well to glass.
In your latest versions (#20 and #21) the shading makes them look darker -- almost "dirty." Not the direction we want to go.
See what else you can do with the ideas in #s 5 and 6.
Thanks so much for your work... I look forward to more versions!