The short answer
Compare quotations against the same bottle drawing, order quantity, closure, decoration, packaging and delivery scope. Compare total project cost rather than unit price alone.
Two prices can describe different products. One may cover an undecorated bottle at the factory, while another includes a cap, individual protection and delivery to a named location. Create a comparison sheet before negotiating.
Normalize the technical basis
Match nominal capacity, glass colour, weight specification, neck finish and inspection requirements. Check whether the price uses an approved sample, an existing catalogue item or a design that still requires tooling.
Separate recurring and one-off costs
Show moulds, artwork setup and sample charges separately from bottle production. Add packing, inspection, freight and other agreed services. Identify the assumptions that could change the final amount, such as artwork revisions or packing changes.
Procurement checklist
- Use one specification revision for all quotations.
- Compare the same quantity and decoration coverage.
- Identify who supplies and assembles the closure.
- Record packing method and named delivery scope.
- Confirm price validity, payment milestones and exclusions.
Common question
Does a heavier bottle always justify a higher price?
Weight alone does not explain the complete price. Shape complexity, process requirements, decoration, closure, tooling and packing also affect the quotation. Ask the supplier to explain the differences for the specified design.