Vodka Splash

I like the concept and how you can see the lime cutting through the water, almost a diagonal line leading the eyes towards the vodka bottle.

Some possible suggestions:

If you wanted motion blue on the water splash great, if not, increase the shutter speed some to freeze it better. Maybe in post erase some of the smaller water blasts that just look like lines because of their speed. Also, maybe some post on the glass reflection. It looks a little jumbled from the motion of the water above it when the shot was taken. Could possibly just use a layer of the reflection with no splash and then post it in afterwards for no blur.

As for the vodka bottle, there is a soft whitish blur around it that I can't quite figure out. Not sure if its the resolution of the image here at fstoppers, or if its a blowback of the flash. The bottle could be turned more in line with the camera so that the brand is fully visible. The light from the right is somewhat making the wording illegible because of the highlights on the bottle. Turning the bottle and slightly positioning the light further to the rear of the bottle will help move that affect back and to the side.

Because of the position of the U and T of Absolut on the curved portion of the image, it has begun to slightly distort the coloring and is bleeding the color out of the letters. If you zoom in you can see it better at the top of the T.

At the bottom of the vodka bottle there is a small puddle of water. If you want it there you may want to light it a little more to give it some more texture or depth. If not, it looks like possibly the bottle was in the freezer and then as it sat for the photo it created some condensate at the bottom.

I am also learning about product photography. Was this a composite image? Was the water splash shot and then the bottle and both combined in photoshop? At first I didn't think this, but then looking at the photo close up and thinking, no way is that glass that big. That's a liter bottle of vodka, that would be quite the drink serving :) If it was a composite, possibly resize the glass so it feels more natural. Also, the front leg of the glass is slightly off plane with the front of the vodka bottle. It looks like it is slightly higher and back from the frontal plane of the bottle.

Having said all that, I really don't know what I'm talking about, but that's what popped out to me. I applaud you on all the techniques that are required to attempt this. I hope I offered some constructive criticism, take it as you wish, this is all art, so, its in the eye of the beholder :)