You’re looking for packaging that does three things at once: keeps your products safe, meets the sustainability commitments your company has made and holds up against tightening EU regulations. Not a compromise between those goals , but all three in one solution.
Sustainable and co-friendly packaging is increasingly where that conversation leads. But what does it actually involve? How long does it take? And does “sustainable” mean you’re looking at the same lead times and costs as conventional materials?
This guide walks through the real process: what custom sustainable packaging is made of, how it gets designed for your specific product, what it costs and what timelines to expect. We’ll use S.Lab’s own workflow as the example throughout.
What “custom” actually means in sustainable packaging
In conventional packaging, custom means tooling. You commission a mold (often in steel or aluminium) that gets machined to match the geometry of your product. That mold then produces thousands of identical units.
The problem: the mold itself costs between €25,000 and €100,000 depending on complexity. It locks you into a specific shape for years. And if your product dimensions change for a new device generation, a reformulated serum or a packaging refresh — you’re back to square one.
Custom eco-friendly packaging produced by S.Lab does not require expensive molds. The reason is that we have developed our own shaping process, where biological materials like mycelium (mushroom root networks) grow into shape during forming process. The “mold” in this case is a lightweight forming tool that costs a fraction of conventional tooling: at S.Lab, customisation starts at €500.
That single number changes the economics of the whole conversation.
What is it made of?
S.Lab’s packaging is made from two plant-based ingredients:
Agricultural waste — the stalks, stems and straws from farms that would otherwise go to landfill or be burned. This forms the structural substrate.
Mycelium — the underground root network of mushrooms. Mycelium is one of nature’s most remarkable binding agents, it grows through and around the agricultural substrate, fusing the material into a solid, dense structure without any synthetic adhesives or chemicals.
The result is a material that is:
- strong enough to protect fragile products during shipping
- waterproof and thermally insulating
- fire resistant
- smooth and pleasant to touch (no scratching, no irritating sound unlike polystyrene)
- 100% biodegradable, decomposing fully in 30–45 days at home
It has been certified home compostable by TÜV Austria (OK Home Compost, S3166) — which matters specifically because most “compostable” packaging only breaks down under industrial conditions that most consumers never access.
The customisation process, step by step
Here is exactly what happens when a brand comes to S.Lab for custom packaging.
Step 1: Share your product dimensions
You send the dimensions of the product that needs to be protected or presented. This can be a simple spec sheet or a sample unit, whichever is easier. No design brief required at this stage.
Step 2: S.Lab prepares visuals
The team creates 3D renderings of the packaging design for your specific product geometry. You see what the finished piece will look like before anything is produced. This is where you can refine the shape, add internal compartments, adjust wall thickness, or request logo embossing directly in the material surface.
Step 3: You approve the visuals
Once the design is confirmed, you sign the contract and S.Lab creates a physical prototype.
Step 4: Approve the prototype
You hold the actual packaging in your hands, test it with your product, confirm it meets your requirements. Any further adjustments happen here before production begins.
Step 5: Production — two weeks
Once the prototype is approved, full production of the first chunk takes approximately two weeks.
Step 6: Delivery and feedback
The finished units are delivered. S.Lab follows up for feedback, which feeds directly into future iterations.
What does it cost?
The honest answer is: it depends on volume and complexity, but the cost structure is fundamentally different from what you’re used to.
Here is how it compares:
| Polystyrene | Molded Pulp | S.Lab | |
|---|---|---|---|
| Customisation / tooling cost | €25,000–100,000 | €8,000–30,000 | From €500 |
| Unit pricing | Medium | Medium | Medium–High |
| Scalability | High | Medium | Industrial scale |
| CO2 per kg produced | 7 kg | 3.5 kg | <1 kg |
| Decomposes in | 500 years | Industrial compost only | 30–45 days |
| EU PPWR 2030 compliant | No | Partially | Yes |
The unit price for mycelium packaging might be higher than commodity polystyrene, but not always. On top of that polystyrene carries hidden costs that rarely appear in the unit price: tolling cost (huge) increasing regulatory risk (it is already restricted under the EU Single-Use Plastics Directive), waste disposal costs, and growing customer aversion that affects brand perception.
For brands where packaging is a touchpoint like beauty, luxury goods, electronics, jewellery, premium food, the brand value of the unboxing experience also factors in. Mycelium packaging has been described by brand partners as creating a “premium, memorable unboxing experience.” Polystyrene has not.
Who is this right for?
Custom eco-friendly packaging at this level works best for brands that:
- are facing EU packaging regulations and need a compliant solution before 2030
- want to make packaging part of their sustainability communications, not just a compliance checkbox
- are currently using EPS/polystyrene and need a like-for-like replacement in terms of protection performance
- want to start with a pilot before committing to volume
The pilot option is important. S.Lab is set up to run small-batch pilots so you can test the packaging with your actual products, your actual logistics chain and your actual customers before making a full transition.
A note on what “custom” means for your brand story
One thing that gets underestimated: custom sustainable packaging is not just an operational decision. It is a communications asset.
When your packaging is made from mushroom roots and farm waste, breaks down in a compost bin in 30 days, and carries your logo grown directly into the material, that is a story your marketing team can use. It is concrete, verifiable, and genuinely interesting to customers who have grown skeptical of vague sustainability claims.
For brands trying to avoid greenwashing accusations (a growing concern as the EU Green Claims Directive takes effect), having packaging with third-party certification and a clear, simple material story is a significant advantage.
How to get started
The lowest-risk entry point is a pilot: share your product dimensions, review the design visuals, and receive a prototype. You are not committing to volume or long-term contracts at that stage, you are finding out whether the material and the process work for your specific product.
If you want to explore what custom mycelium packaging would look like for your product, book a call with the S.Lab team or order directly from the S.Lab e-shop for small batch runs.
S.Lab produces packaging from agricultural waste and mycelium that fully replaces polystyrene, biodegrades in 30–45 days and is certified home compostable by TÜV Austria. Production is based in Spain.
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