Volume Measurement for Custom Bottle Moulds

I’m getting ready to commission a new set of moulds for plastic bottles that will carry chemical products, and I need precise, volume-based measurements for several custom bottle shapes before we cut any steel. The brief is straightforward: translate my sketches and dimensional targets into an accurate method—or digital model—that tells us the true fill volume of each irregular design.

The work must account for:
• plastic material wall thickness typical of chemical packaging
• unusual profiles and curves that don’t match standard cylindrical or rectangular maths
• the tolerance requirements a mould maker will expect at CNC stage

I’m happy to provide hand drawings, reference photos and desired nominal volumes. From you I expect either a well-annotated 3D file (STEP or SolidWorks is ideal) or a clear calculation sheet that a mould shop can follow without questions. If you leverage tools such as SolidWorks, Fusion 360, or a proven CFD-based volume check, please mention it. Accuracy and clarity trump speed; once the numbers are locked, I can move straight to tool design.