So far the best method I found is to create path by using Pen tool and cut out all the background with the reflection as well. However it is very time consuming, and so I am looking for any tim that can speed it up.
I tried to play with the layer blending, find edges+invert but no result was satisfying (may be it can work on small image, but the original image has hight over 5000 mpx, and should last like that). Each time I lost some edges.
I would be glad for any idea that can speed up the masking (ideally something that would take couple of minutes ;) ).
thank you very much for the advice. I tried both, it somehow works for me (at lest for bow and stem), but the foot ... I was not successful there. So probably I will see if I can mix this with the path (and get the quick result). At the end, I like to keep all the whites within the glass and so their gradients, but remove the reflection and the "outer" background.
Your result is very impressive. My final result should be something like this (ok this is one of the final results).