Same specification line
Ask each plant to repeat capacity, neck finish, glass color, closure set and decoration process on one line. If a plant substitutes flint for amber or changes wall thickness, treat that as a new construction, not a silent equivalent. Burst strength and drop-test methods, when requested, should name the method rather than a marketing adjective.
Costs outside the piece price
Mould or neck-ring tooling, print plates or screens, artwork revisions, inner partitions, pallets and freight stay outside the piece or carton price unless the reply lists them. A lower piece figure that hides tooling is not a cheaper total. This desk does not publish a savings percentage.
Sample and document path
State whether you need a stock blank, a decorated sample or a line-trial quantity. Request food-contact and migration testing files for the named glass and closure pairing. Those documents belong to the supplier lot. They are not converted into a site-wide certification badge.
Pack-out and destination scope
Write the export carton flute profile or paperboard caliper, partition cell count and the receiving state or postal code. Oxygen transmission rate and water vapor transmission rate matter only when a buyer is still choosing glass versus a plastic alternative; glass does not remove the need to name the closure liner.
What this desk will not claim
No US contract filling, no held inventory, and no verified factory rating. A supplier preference (high-end, mid-range, budget or undecided) is a shopping filter. Seal initiation temperature applies to any induction or heat-seal liner on the cap, not to the bottle wall. A die line for a pressure sensitive adhesive label should travel with the bottle drawing so print buyers can quote labels on the same silhouette.