Void fill — the material used to fill empty space inside shipping boxes — is one of the most visible inefficiencies in ecommerce fulfillment. It exists because boxes are rarely the exact size of the products they contain. But what if you could eliminate void fill entirely while simultaneously improving product protection, reducing shipping costs, and enhancing the unboxing experience? The answer lies in rethinking packaging from the ground up.
The Three Needs
Every shipping package must satisfy three fundamental requirements: protection (the product arrives undamaged), efficiency (the package costs as little as possible to ship), and experience (the customer feels good about what they receive). Traditional void fill addresses only the first need — and does so imperfectly. Right-sized packaging addresses all three simultaneously.
Why Void Fill Falls Short
Air pillows, packing peanuts, crinkle paper, and foam inserts all share the same fundamental flaw: they are a symptom of the wrong-sized box. No amount of void fill can prevent a small product from rattling around inside an oversized box during a rough transit. The product still shifts, void fill compresses, and damage still occurs — just less frequently.
Meanwhile, void fill adds cost at every stage. Material purchasing ($0.10-0.50 per package), labor to dispense and arrange it, storage space for void fill inventory, and disposal cost for the customer. Air pillow machines require maintenance. Paper dispensers jam. Packing peanuts create a mess. Every brand using void fill is paying a recurring tax on a problem that has a permanent solution.
The One Deed: Right-Sized Custom Packaging
When your box fits your product precisely, void fill becomes unnecessary. A snug-fitting corrugated box or mailer provides superior protection through structural compression resistance rather than loose cushioning material. The product cannot shift because there is no empty space to shift into.
This approach delivers on all three needs:
- Protection: Structural packaging outperforms loose void fill in drop tests and compression tests. Products held firmly in place by the box walls experience less shock than products floating in a sea of air pillows.
- Efficiency: Eliminating void space reduces dimensional weight, cutting shipping costs by 15-30%. Eliminating void fill material saves an additional $0.10-0.50 per package. Packing time decreases because there is nothing to stuff.
- Experience: Customers overwhelmingly prefer opening a clean, precisely fitted package over digging through loose fill material. Right-sized packaging feels intentional and premium. It also generates significantly less waste, which matters to environmentally conscious shoppers.
Implementation Approaches
Custom Inserts
For brands with a limited SKU count, custom corrugated or molded pulp inserts eliminate void fill for your highest-volume products. The insert holds the product securely within a standard outer box. Design costs are one-time, and per-unit costs drop significantly at volume.
Variable-Size Box Systems
Expanding your box size menu from 5 to 15 standard sizes covers most product dimensions with minimal void. This is the simplest implementation path and requires no capital equipment — just coordination with your box supplier and updated packing SOPs.
On-Demand Box Making
For high-volume, high-SKU operations, on-demand box-making machines create a perfectly sized box for every single order. The machine scores and folds corrugated sheets to exact dimensions based on the order's product measurements. Void fill is eliminated entirely, DIM weight is optimized for every shipment, and packing labor is reduced dramatically.
Making the Business Case
Calculate your current void fill spend: material cost + labor cost + storage cost + waste disposal cost. Add your estimated DIM weight overspend (audit 50 shipments and compare actual product volume to billed DIM volume). The sum of these two figures is your annual opportunity. For most brands shipping 5,000+ orders per month, it exceeds $50,000 annually — often significantly more. Eliminating void fill is not just an operational improvement. It is a strategic decision that simultaneously reduces costs, improves protection, and elevates the customer experience.
