Over and Under
I decided to try one of these with the splash on top of the water surface and the flow of the cream underneath. In order to get the cream under the surface I had to use a longer exposure and a manual flash to get the delay in the flow.
Exposure 1.3 seconds
Aperture f20 ... ISO 100
One flash over the drop and the manual one in front and to the right, both at 1/32