By request, a quick explanation about the technique.
First of all, i decide what would be the background. Then i print it as large as possible and put just behind the recipient of water, up side down.
I adjust the focus with a little syringe on the top of the recipient. ( even using f.22, with macro lens, it´s hard to enlarge the focus area, and i have to do this very carefully in the way not to touch the camera after this )
I use an infrared system to shoot the flashes at the right moment the drop falls in the water. In a dark room, i left the camera open for 1 or 2 seconds and i throw the drops. To get a really nice shot, the drop has to fall at the right place a made the focus. That´s why my pictures are sharp. Making an average, I could say that i have to shoot about 300 times to get a picture that surprises me. My secret is patience and persistence. :o)