Way too high key - I can see what you liked about this picture, but the back of the glass is missing, the poured liquid has turned invisible and I think the post processing hurt it.
Simple, forthright composition works well. For me, I think it would enhance the shot to have both the glass and the bottle in focus to bring more attention to the liquid pouring out.
Lighting is way too bright - it washes out detail on the edges of the glass. Detail could be sharper, especially on the rim of the bottle. Good composition.
Darker background or different lighting would have helped the pouring... hmm, is it whiskey or scotch? Anyhow, would have helped the stream of liquid show up better and not made the top of the glass rim fade so badly into obscurity. (The label's too unclear to be sure, but it half looks like it says Malt, which would imply scotch, hmm....) I like the capture of the swirl of the added liquid, and the fact that you used an actual old-fashioned glass. (Okay, that's going to drive me nuts all night. I know Uisge is pronounced pretty much as 'whiskey' but it's also the right language to be, well, Scotch...)
As a Scot, I always enjoy a good dram. Here, however, the sharpness (not of the palate, of the image) leave a little to be desired. Sorry to be blunt, but the overall effect is a little banal.