Anyone sourcing plastic trays for transport, storage, or production quickly faces the question: choose a standard tray from the catalog or have a custom solution developed by a thermoforming specialist? Both options have their place. The right choice depends on the component, quantity, budget, and project requirements. This article explains which option is the right one for you.
Sarah Guaglianone
Updated on August 7, 2026
→ formary offers both options: standard thermoformed inserts in the online shop and custom-made trays via the configurator.
Standard trays are prefabricated plastic trays with defined outer dimensions, compartment geometries, and stacking heights. They often fit common container systems such as SLC and Euro containers.
The most important advantage: the thermoforming tool already exists. This means there are no new tooling costs, and the trays are usually available at short notice. Standard trays are often used for simple transport, storage, or sorting tasks. They are especially suitable when the component is robust and does not require exact positional fixation.
Custom tray solutions are tailor-made plastic trays or inserts that are precisely matched to the component, container system, and process. Cavities, cavity depth, support surfaces, gripping spaces, stacking stops, and material are planned specifically for the project.
Unlike standard trays, a new thermoforming tool is created for a custom solution. This results in one-time tooling costs. In return, the tray can be designed exactly for its intended application. Custom trays are often used when components are sensitive, require a defined position, or are to be handled automatically.
The choice between standard trays and custom trays or inserts depends on several factors. The following table shows the most important differences:
| Criterion | Standard Tray | Custom Tray Solution |
|---|---|---|
| Initial costs | low, no tooling costs | higher, as a tool must be created |
| Delivery time | usually 2–5 days | project-dependent, usually 3–6 weeks |
| Precision fit | limited by existing compartment geometries | exactly matched to the component |
| Component protection | sufficient for robust parts | high for sensitive or complex parts |
| Process reliability | good for simple processes | high for defined series processes |
| Automation | only possible if the geometry happens to fit | can be planned specifically |
| Material selection | limited | can be selected project-specifically |
| Stackability | predefined | can be planned individually |
| Unit costs | usually relatively constant | often decrease as quantity increases |
| Flexibility | low | high during the development phase |
A standard tray is sufficient when your component is robust, fits into existing compartments, and does not require exact positional fixation. In this case, fast availability and low initial costs matter more than maximum precision fit.
Typical use cases include:
Standard trays are particularly attractive when only small quantities are needed or when a quick interim solution is required. Since no new tool has to be built, procurement can begin much faster.
Standard trays are not only suitable for transport and storage, but also as practical support for inventory counting. Fixed compartments, defined quantities per tray, and a clear visual structure make it easier to count, inspect, and assign components.
Especially for small parts, serial parts, or recurring components, standard trays can help organize stock more clearly. Employees can see at a glance whether a compartment is occupied, whether parts are missing, or whether a defined quantity is complete.
Typical advantages during inventory counting include:
If components fit into an existing standard compartment, standard trays can be a simple and cost-efficient inventory aid—without new tooling costs and with fast availability.
A custom tray solution is worthwhile when the tray must do more than just “fit” and instead secure a defined process. This is especially relevant when components are sensitive, must not shift, or must always be positioned the same way in automated workflows.
Custom trays enable:
Particularly in series production, a custom solution can be more economical in the long term. Tooling costs are incurred only once, while unit costs decrease as quantities rise. In addition, a precisely fitting solution reduces risks such as damage, incorrect gripping, or inefficient handling.
A custom tool is necessary when a standard tray or standard insert does not hold your component securely enough. Standard parts have fixed outer dimensions, fixed compartment geometries, and predefined stacking heights. If the component does not fit these exactly, there will be play in the cavity.
This may be uncritical in simple applications. However, with sensitive components, painted surfaces, electronic components, medical parts, or automated processes, it can cause problems.
Possible consequences include:
With a custom thermoforming tool, cavities, support surfaces, cavity depth, wall angles, gripping spaces, and stacking stops are specifically adapted to your component. This results in one-time tooling costs, but gives you a solution that exactly matches the component, process, and quantity.
Total costs consist of tooling costs, unit costs, material, complexity, and project duration. Standard trays involve no new tooling costs. However, shape, compartment geometry, and material selection are predefined. Custom tray solutions involve one-time tooling costs, but can offer lower unit costs and higher process reliability for medium to large quantities.
Note: The following figures are general rules of thumb. Depending on complexity, size, quantity, etc., there may be deviations.
Standard trays are usually available from stock and can be delivered within a few days. This makes them ideal for urgent projects, pre-series runs, or fast procurement without long lead times.
Custom tray solutions require more development time. This includes:
Project lead time is usually 3–6 weeks, depending on the complexity of the tray.
| Tray Type | Delivery Time | Advance Planning Required? |
|---|---|---|
| Standard tray | 2–5 days | no |
| Custom solution | 3–6 weeks | yes (design, toolmaking) |
Precision fit is one of the most important differences between standard trays and custom tray solutions. With standard trays, the component has to fit into an existing compartment geometry. This may be sufficient if the component is robust and some movement in the compartment is not a problem. However, with sensitive parts, this play can lead to scratches, pressure marks, or unstable positioning.
Custom tray solutions, by contrast, are developed directly around the component. This makes it possible to design cavities, support points, and cavity depths so that the component lies securely and is protected.
If your process is automated or requires high repeat accuracy, the custom solution is almost always the better choice. For manual sorting or simple storage processes, the standard solution is often sufficient.
Standard trays are usually offered in common materials and colors. Depending on the product range, ESD variants may also be available. However, the selection remains limited to existing versions.
Custom tray solutions offer full material flexibility. You can choose between all common thermoplastics: PP, PS, ABS, PC, PET-A, PET-G, PMMA, or compounds. This also makes ESD protection, cleanroom suitability, special wall thicknesses, or surface treatments possible.
| Tray Type | Material Selection | ESD, Cleanroom? |
|---|---|---|
| Standard tray | limited (PP, PS, PET-G) | partially available |
| Custom solution | fully configurable | yes, can be planned |
For manual processes, a standard tray is often sufficient. As soon as trays are used in automated systems, the requirements increase significantly. Robots and grippers need defined component positions, reproducible distances, and sufficient gripping space. With a standard tray, this is only possible if the existing geometry happens to match the component and the gripping system.
Custom tray solutions, on the other hand, can be designed for automation from the very beginning. This includes:
In short: If automation is planned, a custom solution is in many cases the better choice.
For small quantities under 100 units, standard trays are usually more economical. The lack of tooling costs has a direct impact on total costs. Standard solutions also often remain the first choice for pre-series runs, prototypes, or short-term projects.
From medium series onward (200–500 units), a custom solution often becomes worthwhile. The tooling costs are spread across more parts, and unit costs decrease. For large series (>1,000 units), the custom solution is almost always cheaper and offers better process reliability.
| Quantity | Recommendation |
|---|---|
| < 100 units | Standard tray usually cheaper |
| 100–500 units | Comparison worthwhile |
| > 500 units | Custom solution usually cheaper |
These values are guidelines. What matters is not only the quantity, but also the risk: if a damaged component is expensive or process errors cause high follow-up costs, a custom solution can also be worthwhile for smaller quantities.
Standard trays are often stackable, but stacking heights are predefined. If your storage system has special requirements, this can be problematic.
With custom tray solutions, stackability can be developed specifically. This is particularly relevant when many trays are in circulation or when containers, shelves, and transport carts need to be used optimally.
The following can be planned, for example:
If storage space is expensive or many trays are in permanent use, optimized stackability can significantly improve cost-effectiveness.
The following checklist helps with the selection:
A standard tray is probably sufficient if:
A custom tray solution is probably advisable if:
In some projects, time is short, but a custom solution makes more sense in the long term. In that case, a standard tray can serve as an interim solution.
This ensures operational readiness while enabling long-term optimization at the same time. This approach is especially useful during production ramp-ups or urgent projects.
The better the data available, the faster a suitable solution can be evaluated.
For standard trays, the following is usually required:
For custom tray solutions, the following is usually required:
The more complete your information, the faster you will receive a suitable quotation. Our configurator guides you step by step through the inquiry process.
formary also supports you when data is missing through technical consultation, and if CAD data for your tray already exists, it can be analyzed for thermoformability using the automated DfM analysis.
Standard trays and custom tray solutions are not competing options, but answers to different requirements. Standard trays stand out for fast availability and low initial costs. Custom solutions offer precision fit, process reliability, and long-term cost-effectiveness.
The deciding factors are component geometry, quantity, process requirements, and budget. If you are unsure which solution fits, have your project reviewed technically. formary offers both paths: standard thermoformed inserts in the online shop and custom-made trays via the configurator or the 3D tray generator.
A custom tool is necessary when a standard tray or standard insert does not hold your component securely enough. Standard parts have fixed outer dimensions, compartment geometries, and stacking heights. If your component is sensitive, complex in shape, or intended for a defined process, too much play in the compartment can lead to shifting, scratches, misgrips, or unstable stacking.
With a custom thermoforming tool, cavities, cavity depth, support surfaces, gripping spaces, stacking stops, and material are specifically adapted to your component and your process. This involves one-time tooling costs, but gives you a precisely fitting tray or insert with higher process reliability, better component protection, and often lower unit costs in series production.
