Launching a new jar shape looks expensive from the outside, so buyers tend to either over-caution and avoid it, or over-confident and under-budget it. Both are expensive. Here is what the process actually involves.
The five stages
1. Specification and feasibility
Before anything is drawn, the dimensions must be settled: volume, wall thickness, base thickness, diameter, height, neck finish, and weight target. This is where most projects fail, because the dimensions were never actually agreed — only sketched.
The critical number nobody discusses is weight. Weight drives material cost, freight cost, breakage rate, and how many pieces fit in a container. It should be a specification, not an afterthought.
2. Mould design and tooling
Pressed glass requires a steel mould. The cost and lead time here depend on the shape complexity.
| Shape type | Relative tooling cost | Typical tooling lead time |
|---|---|---|
| Straight-sided jar, standard finish | Low | Short |
| Tapered or curved body | Medium | Moderate |
| Multi-part mould (complex shoulder, ribbed detail) | High | Long |
| New neck finish or thread profile | High | Long, and may need certification for lid fit |
If your shape is close to something already in production, tooling is cheaper and faster. Ask the supplier what existing moulds are close to your design — sometimes a small modification of a standard shape saves weeks and a significant amount.
3. First sample
The first sample proves the shape exists and looks right. It does not prove the design is manufacturable at your volume, and it rarely performs perfectly.
At this stage you are checking: appearance, wall thickness, base stability, weight versus target, neck finish, and how it feels in the hand. Expect to go around two or three rounds here. That is normal, not a supplier failing.
4. Trial production
A small batch, typically hundreds to a few thousand pieces, produced on the production line. This is where manufacturing reality shows up.
Common findings at this stage: wall thickness drifts slightly from the sample, capacity differs from the specification, weight is higher than quoted. None of these are disasters. They are normal and they need to be absorbed into the final specification.
5. Mass production
Only after the trial batch passes does full production start. All decoration is applied within this stage, and any finishing route that affects decoration order must be fixed before the line starts.
Where buyers waste money
Skipping the trial batch. Approving from a single hand-made sample and then discovering the production version behaves differently is the most expensive mistake in this process. The trial batch exists to protect you.
Approving samples by photo alone. Screens, lighting, and camera angles hide wall irregularities and base wobble. Ask for the sample to be shipped to you, or hold a video call with a measurement caliper in frame.
Not locking the specification in writing. A verbal agreement on wall thickness is not a specification. Get a signed sheet with dimensions, weight tolerance, and capacity stated.
Ordering decoration artwork too late. Artwork needs approval, and screen setup takes time. A one-week delay here can push the entire order past the season you bought it for.
Realistic timelines
For a standard new shape from specification to first mass-production sample, allow six to ten weeks. Complex shapes with plating or new neck finishes run longer. Lead time is one of the most important variables in deciding whether a launch succeeds, and it should be built backwards from your selling season.
What to send us
If you have a shape in mind, send us whatever you have: a sketch, a photograph of something you like, or a sample of an existing jar you want modified. We will tell you honestly whether it is manufacturable, what the tooling involves, and what the lead time looks like.
Send us your idea and we will come back with a feasibility view and a realistic schedule.