https://aescripts.com/mercury/ 

 
Free-form liquid deformations for shapes, solids, text, and masks. Turn any object into a liquid object with customizable liquid thickness and evolution.

Mercury creates free-form liquid deformations for shapes, solids, text, and masks. Using Mercury you can turn any object into a liquid object which means that it will responsively deform as it unites or separates from other free-form Mercury objects. You can also create custom liquid effects by adjusting parameters in the Mercury Control Null. Customize the liquid thickness by adjusting the border and blur levels or add undulating edges to shapes by increasing the jiggle amount and animating the jiggle evolution.