Custom Mailer Boxes with Inserts

Custom mailer boxes with inserts pair a printed corrugated mailer with a fitted interior — foam, die-cut cardboard, or a corrugated tray — that holds your product in a fixed position from dispatch to delivery. They solve a specific problem: a product that’s free to shift inside a box during transit, whether that’s multiple items in a kit, glass or ceramics, or a single item that needs to sit exactly centered for presentation. Crat Packaging builds custom mailer boxes with inserts at its own US facility, with free design support and MOQs starting at 100 units.

Why Choose Our Custom Mailer Boxes With Inserts

• Fitted product protection — inserts hold each item in an exact position so nothing shifts, rattles, or collides with other contents in transit.
• Multiple insert materials — die-cut corrugated inserts for structure and cost-efficiency, or EVA foam inserts for cushioning fragile or irregularly shaped items.
• Multi-item kitting — dividers and compartments keep gift sets, subscription boxes, and multi-SKU kits organized and presentable when opened.
• Full CMYK printing on the outer box — unlimited colors at no extra charge, so the printed exterior and fitted interior work together.
• Premium unboxing presentation — a snug insert makes a box feel considered rather than just functional, which matters for gifting and retail-facing shipments.
• Self-locking corrugated construction — tape-free assembly on the outer mailer, insert seated inside during pack-out.
• Free design support — our team specs insert cavities to your exact product dimensions at no design charge.

Specifications

Customization Options

Insert Material

Die-cut corrugated inserts are the most common choice — cost-effective, recyclable, and strong enough to hold most product shapes in place. EVA foam inserts add cushioning for fragile, glass, or delicate electronic items where impact absorption matters more than rigidity. Corrugated tray inserts work well for multi-item kits, separating each item into its own compartment.

Cavity Design

Every insert is die-cut to your product’s exact dimensions rather than a generic foam block, so the item sits snugly with no rattle. Multi-compartment layouts fit several SKUs — a gift set, a subscription box, or a kit of small parts — into one organized tray.

Outer Box Printing

Full CMYK printing on the outer mailer at no added color cost, with PMS spot color for exact brand-color matching. Matte or gloss lamination, spot UV, foil stamping, and embossing/debossing all pair well with a fitted insert for a premium unboxing.

Closures

Tear-strip closures and self-locking tuck tabs keep the outer box tape-free while the insert stays seated during handling.

Industries & Use Cases

Beauty and cosmetics brands use foam or corrugated inserts to keep glass bottles and jars from contacting each other during shipping. Electronics and hardware companies use fitted die-cut trays to hold components securely without loose movement. Gift and subscription box companies use multi-compartment inserts to present several items in an organized, photo-ready layout when the box is opened. Food and beverage brands use inserts to separate bottles, cans, or breakable packaging within a single shipment.

How to Order

1. Send us your product dimensions, weight, and how many items need to fit in one box for a free quote.
2. We recommend an insert material — corrugated, foam, or tray — based on fragility and item count.
3. Our design team builds a free dieline for both the outer box and the insert cavity, with a digital proof.
4. Approve the proof and production begins, running 10–15 business days standard or 8 days expedited.
5. Boxes and inserts ship flat-packed for efficient pack-out on your end.

Why Wholesale Buyers Choose Crat Packaging

Crat Packaging builds both the outer mailer box and the fitted insert at our own US facility, so cavity fit and box strength stay consistent order after order. There are no setup, plate, or die-cut charges, design support is free, and the minimum order is 100 units. Bulk pricing starts from around $0.75 per unit, depending on size, material, quantity, and finishing.

Frequently Asked Questions

What’s the difference between a corrugated insert and a foam insert?

Corrugated inserts are die-cut cardboard trays — cost-effective, recyclable, and strong enough for most products. Foam inserts (typically EVA foam) add cushioning and impact absorption, better suited to fragile, glass, or delicate electronic items.

Can an insert hold multiple different products?

Yes. Multi-compartment inserts are common for gift sets, subscription boxes, and kits — each cavity is die-cut to a specific item so everything stays organized and presentable.

Do inserts add much to the cost?

It depends on material and complexity — a simple corrugated divider adds less than a multi-cavity foam insert. Tell us your product mix and we’ll quote both the outer box and insert together.

Are foam inserts recyclable?

EVA foam is not curbside-recyclable in most areas; corrugated inserts are fully recyclable. If sustainability is a priority, we can recommend a corrugated tray option instead.

Can the insert and the outer box both be printed?

Full-color printing is standard on the outer box. Inserts are typically left unprinted for cost efficiency, but let us know if branded insert printing matters for your project.

What’s the minimum order quantity?

Our minimum order is 100 units for boxes with inserts, with no setup, plate, or die-cut charges added.

Need a mailer box that keeps every item exactly in place? Get a free quote from Crat Packaging today.