VIZ have been making liquid special-effects for many years. We have made effects using water, beer, and coffee, as well as effects involving more viscous liquids like chocolate, milk, honey, strawberry sauce.
Liquids special effects often involve mobile plumbing, pumping, squirting, pouring, or spraying of liquids.
We have also been asked to make bubbles, swirls, vortices, foam effects and more….
Water will make a very thin continuous “film” under certain circumstances… We’ve made films using various viscosities of oil and even glucose, (although other physical-effectsstart taking over at these high viscosities.
In fact we’ve made a spiral of liqueur using a twisting film of transparent oil… We want to soon make a floating carpet of chocolate.