Create a 3D printable tapered cup for FDM printing. Height: 76.2 mm. Bottom outer diameter: 40.64 mm. Top outer diameter: 48 mm. Wall thickness: 2.5 mm uniform thickness. Flat bottom with 3 mm solid base thickness. Add a slightly thicker rim lip at the top: 3 mm tall and 3 mm wider than the top diameter. The model must be hollow inside. Clean smooth geometry. No textures. No surface details. Manifold solid suitable for STL export and 3D printing. Engineering style, simple geometry, no artistic deformation.