R&D for an ambitious (but confidential) motion design project about plastics and the environment.
To achieve this effect I've concatenated 3 simulations in Houdini: FLIP (water), VELLUM (bottle) and BULLET (cap).
To make it more realistic, some parts of the plastic are deformed but get back to their original shape, while other zones are deformed permanently (plasticity) and some edges are totally broken (to simulate permanent pinching).
To achieve the almost-rigid soft body, I used some techniques learned from SideFX Advanced Vellum Masterclass.
Shader development and rendering with Redshift.