if a flexible container is pushed on then that container will change shape
fluids has shape_of_containers flexible_container is not flexible_thing. container is container_shaped_object. container_independent_shape is not tangible_thing. flexible_container is container_product. fluids has not shape_of_containers flexible_container is not container_product. container is rigid_for_holding_else. container_independent_shape is tangible_thing. flexible_container is flexible_thing.