The short answer
Nominal capacity identifies the intended pack size; brimful capacity describes the volume up to the specified full condition. Ask the supplier to define the measurement method and tolerances for both.
A bottle described as 750 ml does not mean its brimful capacity is also 750 ml. Buyers need enough information to review the intended fill level, closure arrangement and product presentation.
Use the drawing definitions
Locate nominal capacity, brimful capacity and any specified filling level on the approved drawing. Confirm the reference conditions and measurement procedure used in the supplier’s records. Avoid comparing results obtained under different methods.
Review the filled pack
Assess the intended liquid level with the actual product and closure arrangement. Refer filling-control questions to the responsible production team. Do not assign a universal headspace or tolerance from a catalogue capacity alone.
Procurement checklist
- Identify nominal and brimful capacity separately.
- Request the measurement method and conditions.
- Confirm relevant tolerances on the drawing.
- Review the intended filling level.
- Retain the approved filled-pack reference.
Common question
Can two bottles with the same nominal capacity have different overall dimensions?
Yes. Capacity does not uniquely define shape, glass distribution, height or width. Compare the actual drawings when reviewing equipment, labels and cartons.