How I took this was a bit mad but here goes:
I took one of those plastic boxes than chrissy cards come in and sealed the bottom with gaffer tape, (silicon would have been better in hindsight). I then 1/4 filled the box with water and a couple of drops of blue food dye (which of course began to leak all over the place but slow enough to get some pics). I then made a backlit backdrop out of some left-over white foam core and an old flouro tube. Placing the water filled box in front of the foam core, I jiggled it from side to side to get some movement. There was nothing special about the settings although I changed the white balance around to get a yellow glow of the flouro.
Camera: Canon A590 IS
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