This one came out pretty well! Would have prefered a slight angle towards me but..
Canon EOS 450D 2sec Exposure F16 ISO 100.
Vivitar 255 set to 1/16th power with vari-power module set to 1/16th power handheld and hand released to above-left of shot.
Blue Dyed milk with green milk impacting a spout. Curves + Crop in photoshop + removing shadow :( need 2 flashes