Three routes, not two
The question is usually framed as stock or custom, but in practice there are three routes. The first is a stock item from an existing mold, sold plain or in a standard colour. The second is a stock mold with branding: a printed lid, a label, a sleeve, a private label carton or a custom colour. The third is a new mold made to the buyer's design. Most programs that think they need the third route are well served by the second, and most programs that start on the first move to the second within a few orders. The decision table below makes the differences concrete.
Route 1: stock items
A stock item is a container that a partner plant already makes for many buyers. The takeout series from a partner plant in Huizhou, Guangdong, is a good example: rectangular boxes on a 170x115 mm footprint from 500 ml at 34 mm deep and 17 g to 1,000 ml at 64 mm and 22 g, round tubs to 2,000 ml and bowls from 360 ml. The divided fruit range, the soup cups and the starch-PP blend bowls work the same way.
Strengths: the lowest minimum, typically 1-10 cartons from stock molds and often mixed across sizes, samples in 3-7 working days and bulk in 7-15 days. The model has a history, so fit and behaviour are known. Limits: nothing distinguishes the product from other buyers' products, the size is fixed, and the material grade is the plant's standard, which needs a document check for each market.
Route 2: stock mold with branding
The second route keeps the existing mold and changes what the customer sees. Lids can be printed, cups can carry a sleeve or label, paper boxes can be printed in full colour, and storage boxes can take a custom colour and a branded carton. Typical minimums are 10,000-50,000 pieces per item for printed lids, cups or sleeves, and 5,000-10,000 per design for printed paper boxes. Storage lines usually start from 1,000-3,000 pieces per item depending on size and mold. Printed samples take 7-15 working days and bulk 15-30 days.
Strengths: a branded product without tooling risk, on a model whose fit is known. Limits: the shape is shared with other buyers, colour matching needs a fixed masterbatch and an approved reference, and print quality has to be checked for adhesion and rub resistance. See private label containers.
Route 3: new custom mold
The third route builds a new tool for a shape that does not exist at partner plants: a new footprint, a branded relief on the lid, a special compartment layout or a feature such as a valve seat. The path is drawing, sample mold or production tool, T1 trial, corrections and golden sample. The mold cycle is typically 25-45 days to T1, inferred from partner plant practice, and the first bulk order with a new mold typically takes 45-60 days including the mold. New mold programs usually start from 50,000-100,000 pieces per item for food containers, though public plant listings range from 5,000 to 50,000 depending on category.
Strengths: a product no other buyer has, exactly sized to the use. Limits: tooling cost, mold ownership terms that must be written down, a longer launch and the risk that the first trial needs corrections. See mold cost and ownership.
The decision table
| Factor | Stock item | Stock mold, branded | New custom mold |
|---|---|---|---|
| Typical minimum | 1-10 cartons, mixed | 10,000-50,000 per printed item; 5,000-10,000 per paper box design | 50,000-100,000 per item for food containers |
| Samples | 3-7 working days | 7-15 working days | T1 trial in 25-45 days |
| Bulk lead time | 7-15 days | 15-30 days | 45-60 days first order incl. mold |
| Tooling | None | Print plates or screens | New mold, ownership in writing |
| Differentiation | None | Brand on lid, sleeve, carton, colour | Own shape and features |
| Main risk | Grade and documents | Colour and print quality | Trial corrections and launch delay |
All figures are typical reference ranges, confirmed in writing for each program; see MOQ and lead time.
Questions that decide the route
- Does an existing model fit the food, the portion and the delivery bag? If yes, start on stock.
- Does the customer need to recognise the brand on the container itself? If yes, branded stock is usually enough.
- Does the product need a shape or feature that does not exist? Only then consider a new mold.
- Will annual volume carry the mold over its life? If not, stay on branded stock.
- Can the launch wait for a T1 trial and corrections? If not, launch on stock and develop the mold in parallel.
A common path
An illustrative example: a meal prep brand launches on stock PP boxes from the 170x115 mm series in two depths, mixed in a few cartons, to test portions with customers. Once the portions settle, it moves to printed lids on the same mold, at the printed minimum, with a private label carton. A year later, with steady volume, it commissions a new mold with a branded relief and a compartment layout matched to its menu, keeping the stock items running until the golden sample is approved. Each step builds on the last, and none of them bets the launch on a tool that has not been tried.
Mixing routes in one range
A range does not have to follow one route. Hero items that carry the brand can be printed or custom, while supporting sizes, soup cups and cutlery stay on stock. That keeps total minimums manageable and avoids tooling for items customers barely notice. The desk plans the range so stock and branded items share footprints and lids where possible, which keeps stock simpler and lets one shipment carry every route; see container range planning.
Documents on every route
The route changes the product, not the compliance duty. A stock item, a branded item and a custom item each need a supplier declaration for the target market, FDA 21 CFR or EU 10/2011 for plastics, and migration testing per report. Print inks and labels on food contact surfaces add their own checks. A new mold in a new grade starts the file from scratch. The compliance guide lists the documents per market.
Send the use, volumes and launch date through the quote form and the desk returns a route recommendation with matched stock models first.