Definitely getting there, hope you don't mind if I critique a little.
Like has been said before, definitely shoot at your sync speed. Remember that as far as the camera is concerned, you want the room behind you to be pitch black, so that it doesn't register on the bottle. You might even need to turn off that overhead light that keeps showing up in the bottle, but I think shutter speed will probably take care of it.
Next, get the tupperware and plastic off your flashes. Their purpose is to send light up to the ceiling to light up the rest of the room, which we're trying to keep pitch black.
Now, I'm not sure why you put that reflector sticking out on the left, but it's going to make your edge highlights look uneven, and probably introduce some glare that you don't want: it should go. A good reuse of it would be to put it above the other two, also flat against the background like they are, so you get some nice reflections in the top edges of the glasses.
The really tricky part is going to be with the lights themselves, though. You need to light up just the edges around the background. If you want the background to have color, instead of blacking out, you can put a light on it, too, but the two lights really need to be separate. Generally, the way to accomplish this is by having the subject, the background, and the rim around the background all on different planes, with the subject closest to you, the background farther away, and the rim the farthest away. Then you can put a light behind the background and have it light the rim, and if you want to light the background, you can do it from below and slightly behind the subject. Of course, this would all be mighty difficult with Canon's wireless system. Did I ever mention how much I hate wireless ETTL?
And that's about all there is to it. Also, you can use either a softbox, or a rectangular reflector similar to the one you have on the left now, but placed farther away, to create some window-esque highlights on the bottle. The trick is to make sure you fill up the rectangle completely, because as you find before, any light modifier you try to use will "imprint" itself on the bottle, so it's important that it look like something natural, not studio equipment. Also, for bonus points, you can add black tape across the device in question to simulate window panes, and make it look just that much more natural.
