STEP Model for Bottle Cap

I need a clean, ready-to-manufacture 3D model of a plastic cap whose sole job will be sealing a bottle with a circular neck. Please deliver the file in STEP format so my supplier can drop it straight into their tool-path software for prototyping and, eventually, injection molding.

I will provide neck dimensions, required wall thickness, and any thread details as soon as we start; you simply translate those specs into a watertight solid, apply sensible draft angles where needed, and double-check that the inner seal surface mates flush with the bottle rim.

The project is finished once the STEP file opens error-free in SolidWorks or Fusion 360 and passes their default geometry integrity checks.