I actually saw a video on YouTube where someone was using a fish tank and Bell Peppers to splash the water. I had the idea to use colored water in a glass and drop something into it. I set the camera to shoot multiple times at the fastest shuttersprred that my flash could sync with. It took many attempts to get it set up right. The effect though is well worth it. In this photo it looks like fluid is being poured into the cup however, it is an actual splash from dropping a Mentos into the cup. Thanks for commenting. I need to touch this up alittle because the grey was not the original background. It was white and I changed it. There are some shadows I need to get rid of.