I think you will need to use Solidworks Simulation if you want to examine the displacement of the container. Take a look at some of the links in the "More Like This" section to the right side of this posting. One in particular is:
https://forum.solidworks.com/message/177555#177555 "Re: How to add the boundary condition"
Flow Simulation can model the pressure distribution of the fluid under gravity, but I don't think it will model the static reaction forces and displaements of the container.
exactly what i was looking for, thanks Eric