Large personal care brands and multinational buyers do not qualify a bottle supplier on price. They qualify it through five gates in sequence: credentials, factory audit, sample approval, proven capacity, then commercial terms. Each gate can be passed, and each one can end the process. Below is the order those gates come in, what to hand over at each one, and how to prove scale without visiting.
Quick answer
- Five gates in order: credentials, audit, sample approval, capacity proof, then commercial terms. Do not negotiate price before gate four.
- Bring certificates with numbers, audit report copies, export records and a written capacity statement — a description of what you hold is not evidence.
- Sample approval runs in three stages: 20–30 pieces, then 2,000–5,000, then production. Each stage is a separate signed approval.
What are the five gates a large buyer puts a packaging supplier through?
Supplier qualification inside a procurement team is a sequence, not a checklist. The sequence exists because each gate answers a question the previous one could not. Skipping a gate does not save time; it moves the risk to a later stage where more money is already committed.
| Gate | What the buyer is testing | Evidence requested | Where it fails |
|---|---|---|---|
| 1. Credentials | Is this a legal, auditable entity that can sign and be held to terms? | System certifications, audit report copies, business licence, export record | Certificates named but no numbers or report copies |
| 2. Audit | Does the factory match the written description? | Site visit, or a live video walkthrough with dated evidence | Refusal or delay, or a walkthrough staged on one floor |
| 3. Sample approval | Does the physical product match the specification, three times over? | Signed golden sample at each stage | Approving on appearance and discovering drift in stage two |
| 4. Capacity and lead time | Can this plant actually deliver your volume in your window? | Line list, daily output, mould count, material sourcing route | A claim of capacity with no production line or tooling to back it |
| 5. Commercial terms | Can this supplier live inside the framework a procurement team signs? | Volume tiers, price validity, payment structure, incoterm | A quote valid for 30 days against a 12-month programme |
Gate 1 and gate 2 are about identity. Gate 3 and gate 4 are about physics — can the product and the volume actually exist. Gate 5 is paperwork. A supplier who is strong at one and vague at another is normal; what matters is that the buyer knows which gate failed, and why. The factory-versus-trading-company question underneath gate 1 is covered in our guide to how to vet cosmetic bottle suppliers.
What documents should a serious buyer be able to request in one email?
Everything on this list is ordinary to produce and impossible to produce on the spot. If a supplier cannot return this set within a working day, that is the answer to gate 1.
| Item | What it proves | Format that passes |
|---|---|---|
| Quality management system certification | The plant runs a documented system, not ad hoc | Certificate number plus issuing body, with the certificate itself |
| Third-party or customer audit reports | Someone else has inspected the site | Report copy, not a promise to send one later |
| Recycled content certification where relevant | Claimed recycled content is traceable | Certificate scope matched to the material you will buy |
| Export record and destination markets | The plant has shipped to your market before | Markets and years, without naming customers if they object |
| Production line list and daily output | Capacity is real and sized per line | Line type, output per line per day, number of shifts |
| Mould inventory statement | Tooling risk is understood | Count of existing moulds, and which are relevant to you |
| Resin and masterbatch sourcing route | Material supply will not stop mid-programme | Whether resin is sourced or produced in house |
At Shijin Packaging the credential set is: manufacturing since 2003, more than 2,000 existing moulds, ISO 9001, GRS and SGS audited production, plants in Shenzhen, Huizhou and Guangzhou, and roughly 500,000 bottles a day across the group. What matters to a procurement team is not the size of those numbers but that each has a document behind it. The material-facing side of the file is covered in our guide to which certifications cosmetic bottles need for the EU and US.
How do large buyers run an audit, and what do they look at?
On-site visits are still the norm for a new supplier at scale; remote verification is the norm once the relationship exists. A video walkthrough is acceptable if it is live, unedited and specific — not a pre-recorded tour with music over it.
- Incoming goods and storage. Is resin segregated by grade and lot? Are masterbatch bins labelled with the Pantone reference and mixing ratio?
- The production floor. Are lines identified, and is output per line visible? Is there a run sheet for the day?
- Tooling. Is mould maintenance logged, and is there a repair history for the tooling that matters to you?
- QC. Is there a documented check at the moulding machine, or only a final inspection? Is the AQL level written down?
- Testing capability. Drop test, leak test, torque and capacity verification — on site or subcontracted, and to which standard.
- Documentation flow. Can they produce an export document for a real past shipment, not a template?
Two questions separate a plant that can scale from one that cannot. Show me the run sheet for a line similar to mine, from the last three months. And which line runs my product during peak season?
What is the three-stage sample approval process, and why does it run in three stages?
Because each stage tests a different thing and the cost of the failure rises at every step: stage one tests whether the product is right, stage two whether it repeats, stage three is production.
| Stage | Quantity | What it proves | Approval must be in writing because |
|---|---|---|---|
| 1. Feasibility sample | 20–30 pieces | Dimensions, neck finish, closure fit, decoration, material and hand feel match the specification | Every later claim is measured against this piece |
| 2. Trial production | 2,000–5,000 pieces | Injection or blow moulding repeats without drift, and a real filling line accepts the product | Appearance on 30 pieces says nothing about repeatability on 2,000 |
| 3. Mass production | Full order quantity | The shipped goods match the approved golden sample, with agreed tolerances | This is the reference used when a complaint is raised months later |
Send the golden sample back to the factory at the moment of approval, marked and signed by both sides, and keep it on your side too. When a dispute arrives eight months later, that signed piece is the only reference that is not a memory. The checks to run before you sign are in our guide to what to check on a packaging sample before you approve it.
How do you verify capacity when the order is a million units?
You cannot audit forward capacity by looking at a past invoice. You verify four things instead, and each has a document or a number behind it.
| Claim | The question behind it | Evidence that closes it |
|---|---|---|
| Existing production lines | Which specific lines, running what? | Line identification with output per line per day and shift pattern |
| Daily output | Is this a single line or the whole plant? | Output split by line; group output stated separately from what you would use |
| Mould count and ownership | Is your tool reserved or shared? | Mould inventory with your tooling identified and marked for your order |
| Raw material channel | What happens if resin allocation tightens? | Whether resin is produced in house or purchased, and typical replenishment cycle |
Then run the arithmetic yourself and ask them to run it too: your quantity divided by the daily output of the lines allocated to you gives working days, and those days plus the New Year and October holiday weeks give the real delivery date. If their answer and yours differ by more than a few days, you have found the assumption that was never stated — usually that your product shares a line with someone else’s.
Tooling is the other half of capacity. A new mould adds roughly 30 working days, and with more than 2,000 moulds already running, an existing tool is the fastest route into a large programme. Our tooling cost and lead time breakdown covers both.
What changes when the order is an annual framework instead of a monthly one?
Almost nothing about the specification, and almost everything about the paperwork. An annual framework is a price agreement plus a forecast, and the risk shifts from the supplier to the buyer unless the terms are written carefully.
| Monthly ordering programme | Annual framework with monthly releases | |
|---|---|---|
| Price | Revalidated each month; moves with the market | Fixed for the term; the buyer carries the resin price movement |
| Quote validity | Tied to a single shipment | Must cover the whole term; a 30-day validity is useless here |
| Capacity | Booked per order, easier to move | Reserved in advance; freeing it later has a cost |
| Payment | 30/70 per order, releasable against documents each time | Same structure, but repeated, so the pattern matters more than one instance |
| Forecast | Not required | Required, and it needs a tolerance band and a rolling-update rhythm |
| Quality reference | Golden sample approved per product | One approved golden sample covering every release in the term |
Two numbers decide whether a framework is fair. Quote validity: if the price is fixed for a year, the supplier carries resin price risk for a year and will price that in. And the forecast band: a forecast with no tolerance is a forecast the buyer will miss. Ask for both in writing.
Who should talk to whom, and how fast should each side reply?
Large buying organisations separate three conversations, and mixing them is the most common cause of slow qualification. The technical conversation is about the product. The commercial conversation is about price and terms. The schedule conversation is about slots and dates. Each has a different owner and a different cadence.
| Conversation | Counterpart on the supplier side | Expected cadence | What should not be decided here |
|---|---|---|---|
| Technical and specification | Product or quality engineer | One working day for a factual question | Price, and any commitment to a delivery date |
| Commercial and terms | Account contact | One working day for an acknowledgement; a few days for a full quotation | Specification changes, which invalidate the quotation |
| Schedule and shipping | Whoever books production and freight | One working day | New tooling, which is a project, not a schedule item |
The rule that keeps this moving: every message has one owner and one question, and the reply time is set in advance. Our guide to what to put in your first email to a supplier sets out how to open each channel so the reply arrives with information rather than another request.
What buyers actually asked us
Real questions from inquiries we handled. Company names, countries and order quantities have been removed, because those are our customers’ business.
“Please share the following information for the import file: supplier, product, currency, incoterm, tariff heading, certificate of origin applicable yes or no, dangerous goods yes or no, total gross weight including pallets, gross weight per carton, units per carton, total cartons, units per pallet, pallet dimensions, number of pallets, quantity being shipped, mode and port of loading.” — large personal care group, Latin America
“The maximum time to take part in this quotation is two working days, and note that the price supplied must apply for one year.” — multinational personal care buyer
“Before we start regular mass production we have a sample approval process. It starts with a small number of pieces from you; if those are approved we then ask for a second order of several thousand pieces for further evaluation, and only after that do we place our larger orders.” — personal care company, annual monthly-order programme
Three mistakes we see every year
1. Negotiating price before the sample is approved. A price agreed against an unapproved sample is a price against an assumption. Approve the golden sample first, then quote, because a specification change at stage two invalidates the number you spent three weeks negotiating.
2. Accepting a description of certificates instead of the certificates. “We are ISO certified” tells a procurement team nothing. They need the certificate number, issuing body, scope and expiry date. That is a five-minute request for a real supplier and an unusual delay for anyone else.
3. Asking for capacity in the wrong unit. “We can do one million bottles a month” is not a capacity statement unless it says on which lines, with what shift pattern, and alongside what else. Group output and your output are two different numbers, and only the second one matters to your delivery date.
What to send a procurement team so qualification moves in one pass?
- Company legal name, address and the entity that will sign the contract
- Quality management certificate numbers, issuing bodies and expiry dates
- Audit report copies already in your possession, with dates and scope
- Production line list with output per line per day and shift pattern
- Mould inventory count, and confirmation of which tooling is available to you
- Resin and masterbatch sourcing route, and whether material is produced in house
- Sample protocol in writing: stage quantities, what each stage approves, who signs
- Golden sample return procedure — you keep a signed copy as well
- MOQ per model and per colour, masterbatch minimum, and the new mould lead time
- Volume tier pricing with quote validity stated, plus payment structure and incoterm
- The import data file fields your broker will need
Send it as one document rather than eleven emails. Procurement teams qualify on completeness, and completeness is easier to see in a single file.
Frequently asked questions
How long does full supplier qualification take?
Roughly two to six weeks for a first supplier with no tooling in place. Most of it is document exchange and the stage-two trial order, not factory time. If new tooling is needed, add roughly 30 working days.
Is a video factory audit acceptable?
For an initial qualification, yes, if it is live, unedited and specific: line identification, resin storage, mould maintenance records and a real run sheet. At million-unit scale, plan an on-site visit before you sign a framework.
What should quotation validity be for an annual framework?
Long enough to cover the term you are signing. A framework that runs a year needs a validity period that matches, or the price is renegotiated at the first release.
Do I need to approve samples at all three stages?
Yes, in writing, each time. Stage one confirms the specification, stage two confirms repeatability, stage three gives you the reference for a later dispute. Skipping stage two is the most expensive shortcut in packaging.
Who should sign off the golden sample?
Your own quality or technical function, not the person who placed the order. Ask the factory to keep a signed and dated copy and send a photograph of the marked sample on the day it is approved.
How do I compare two suppliers on capacity?
Ask both the same four questions — which lines, daily output per line, mould availability, material route — then check whether their answer for your product matches their stated plant output.
About Shijin Packaging
Shijin Packaging Products Co., Ltd. has been manufacturing plastic packaging in Shenzhen, Huizhou and Guangzhou since 2003. We hold more than 2,000 existing moulds, run ISO 9001, GRS and SGS audited production, and ship roughly 500,000 bottles a day for cosmetic, personal care, household, car care and food-grade customers. Qualification packs, audit walkthroughs and the three-stage sample protocol are all things we run routinely, and we would rather answer all five gates in one pass than one gate at a time.
Start at gate one: send your specification and annual volume, and we will return the credential set, the line-level capacity statement, the tooling position and the three-stage sample plan for your product.