- Die-cut from smooth folding paperboard (white or kraft card) or crush-resistant E-flute and B-flute corrugated board.
- Ships flat and pre-creased in compact cartons, saving up to 80% of pallet storage space compared with pre-molded trays.
- Minimums depend on the product and are confirmed on your quote; turnaround is 10 to 14 business days (rush 4 to 5).
- Includes free structural engineering, custom dielines, a 2D proof and 3D mockup before payment, and free 50-state delivery.
Custom Cardboard Inserts
Custom cardboard inserts engineered from pre-scored folding paperboard and fluted corrugated board to lock bottles, jars, candles and multi-item kits inside cartons and mailers while shipping flat to your warehouse. Minimums depend on the product; we confirm yours with your quote. Produced in 10 to 14 business days (rush in 4 to 5) with free structural dielines and free US shipping.
What are custom cardboard inserts?
Custom cardboard inserts are die-cut, pre-creased internal platforms, bottle neck-locks, fluted cradles and interlocking slotted partitions crafted from folding paperboard or corrugated fiberboard. Unlike pre-formed plastic blister trays or bulky foam blocks that take up pallet after pallet in your warehouse, cardboard inserts arrive flat on pallets and fold along precision score lines in seconds at the packing bench. Once dropped inside a folding carton, corrugated mailer box or shipping case, their folded legs and side walls create a suspended air-cell buffer that keeps glass jars, serum droppers, candle vessels and beverage cans from knocking together or hitting the outer walls. Because paperboard and white corrugated take full-color CMYK, Pantone spot inks, foil stamping and matte lamination, the insert deck doubles as a printed stage. Minimums depend on the product; we confirm yours with your quote. Turnaround is 10 to 14 business days with free US shipping.
Cardboard inserts facts
- Minimum
- Confirmed with quote
- Turnaround
- 10-14 business days
- Rush
- 4-5 business days, quoted
- Board stocks
- White SBS card, kraft card, E-flute & B-flute corrugated, recycled
- Cavity options
- 1, 2-4, 5-12 or 13+ die-cut wells or interlocking grid cells
- Printing
- Full color (CMYK), Pantone match guaranteed, white ink on kraft
- Finishes
- Matte, gloss, soft-touch, foil stamping, embossing, spot UV
- Delivery format
- Flat-packed, die-cut and pre-scored for fast hand folding
- Shipping
- Free to all 50 states
Should I choose folding paperboard, fluted corrugated or slotted cardboard partitions?
| Cardboard insert style | Board structure | Weight capacity & protection | Best use cases |
|---|---|---|---|
| Folding paperboard riser tray | 16 pt to 24 pt SBS white or kraft card | Light to medium items; ultra-smooth print deck | Serum bottles, lipsticks, chocolates and retail folding cartons |
| E-flute corrugated cradle | 1/16 in micro-flute corrugated board | Medium to heavy items; crisp die-cut cutouts + crush resistance | Skincare jars, 8 oz candles, supplement bundles and PR mailers |
| B-flute corrugated suspension tray | 1/8 in thick fluted corrugated board | Heavy fragile vessels; creates perimeter air-buffer zones | Glass jars, ceramic mugs, electronics and subscription shippers |
| Interlocking slotted grid partition | Cross-slotted card or corrugated divider strips | Separates 4, 6, 12 or 24 upright cylinders | Hot sauce 4-packs, beverage cans, spice jars and ornaments |
| Neck-lock & base-well collar | Two-tier folded card frame gripping neck and base | Stops tall bottles from tipping forward inside vertical cartons | Perfume flacons, beard oil droppers, hair serums and spirits |
| Stepped multi-depth stage | Multi-score folded platform with varied floor heights | Aligns tall tubes and short jars at one flush viewing level | 3-step skincare routines, starter kits and influencer boxes |
Not sure which style fits?
Request a Quote →How are custom cardboard inserts sized to fit inside cartons and mailers?
We engineer every folded cardboard insert 1/16 to 1/8 inch smaller than the inside Length × Width of your outer box so the folded legs slide in without catching on side flaps. Whether you are comparing custom paperboard box inserts, corrugated cardboard box dividers, die cut cardboard tray inserts, printed cardboard product risers or flat folding cardboard packaging inserts, we size the template to your exact container.
| Insert outer size (L × W × D) | Construction & cavity count | Typical product & outer box |
|---|---|---|
| 3.25 × 3.25 × 4 in | 1 cavity (corrugated air-cell collar) | 9 oz glass candle tumbler inside a tuck-top carton |
| 5.75 × 3.75 × 1.75 in | 2 cavities (folded SBS card riser) | 30 ml dropper bottle + eye cream jar in a cosmetic box |
| 7.875 × 5.875 × 2.5 in | 3 cavities (stepped E-flute tray) | Cleanser, toner and moisturizer inside an 8 × 6 × 3 mailer |
| 8.875 × 6.875 × 3.5 in | 4 cells (slotted corrugated grid) | Four 5 oz hot sauce bottles or jam jars in a shipping box |
| 10.875 × 8.875 × 2.5 in | 5 to 8 cavities (printed PR deck) | Creator kit with numbered skincare steps and thumb notches |
| 11.875 × 8.875 × 6 in | 6 or 12 cells (interlocking divider) | 6-pack or 12-pack craft beverage cans or glass jars |
Have your inside dimensions ready? Request pricing across up to 3 quantities.
Request a Quote →How do I choose cardboard inserts?
- Match board grade to item weightPick smooth paperboard card for items under 6 oz; step up to E-flute or B-flute corrugated for heavy glass jars and candles.
- Use air-cell legs for glass dropsFolding a 0.5-inch perimeter air gap around a glass vessel keeps it away from outer box walls during parcel drops.
- Pick slotted grids for multi-packsInterlocking cross-slotted corrugated partitions are the fastest way to separate 4, 6 or 12 upright bottles or jars.
- Print ritual steps on the deckUse the flat top face of a card riser to print step numbers, QR codes or usage instructions beside each cutout.
- Add thumb cutouts for snug wellsDie-cut half-moon finger notches on opposite sides of each opening so customers lift flush bottles out cleanly.
- Keep 100% curbside fiberPairing a kraft or white cardboard insert with a corrugated mailer keeps the entire package single-stream paperboard.
What are cardboard inserts made of?
Which finishes can cardboard inserts have?
Which structural features can I add to custom cardboard inserts?
Cardboard inserts specifications
| Spec | Options |
|---|---|
| Insert constructions | Folded paperboard riser tray, fluted corrugated cradle, interlocking grid partition, bottle neck-lock collar |
| Cavity counts | 1, 2-4, 5-12 or 13+ die-cut cavities or slotted partition cells |
| Board stocks | White SBS paperboard, brown kraft card, white or kraft E-flute and B-flute corrugated, recycled board |
| Printing | Full color (CMYK), Pantone color matching guaranteed, white ink on brown kraft |
| Finishes | Matte, gloss, soft-touch, foil stamping, embossing, debossing, spot UV |
| Shipping format | Delivered flat, die-cut and pre-creased for fast hand folding (slotted partitions ship flat in strips) |
| Minimum order | Minimums depend on the product; we confirm yours with your quote; delivered within ±5% |
| Structural engineering | Free custom structural dieline, 2D proof and 3D mockup before payment; physical prototypes and drop testing available |
| Turnaround & delivery | 10-14 business days (rush 4-5 days); free shipping to all 50 US states, worldwide DDP available |
Ready to quote your cardboard inserts? Compare up to 3 quantities with a free 3D mockup.
Request a Quote →What products do brands secure with custom cardboard inserts?
Custom cardboard inserts give brands a printable, flat-storing alternative to plastic blister trays and bulky foam blocks. Tell us the dimensions and weights of your items and whether your box ships directly in the mail or sits on a retail shelf, and our structural team will engineer the right board grade and score layout.
Cardboard inserts design ideas
Example designs with made-up brands. Your packaging is made to your design.
What are the most common custom cardboard insert mistakes?
Folded paperboard and corrugated trays rely on score-line geometry and flute direction. Avoid these five mistakes. When specifying custom printed cardboard inserts, cardboard inserts with logo, printed cardboard inserts, branded cardboard inserts and wholesale cardboard inserts, avoid these common production mistakes
- Using thin 16 pt folding card for a heavy 14 oz glass candle jar without an E-flute corrugated base or folded support leg underneath.
- Designing cavity cutouts right up against the outer edge of the tray without leaving a 0.5-inch perimeter air-cell buffer for glass items.
- Cutting snug bottle wells without half-moon thumb notches, making it hard for customers to lift flush products out of the rigid card deck.
- Running corrugated flutes horizontally instead of vertically along load-bearing riser legs, which weakens top-to-bottom crush strength.
- Sizing the insert to the outside dimensions of the mailer box so the tray buckles when pushed between the inner side walls.
Chat with a designer now
Share your logo, a sketch or an AI image. We'll rebuild every element cleanly onto your box dieline and send a 3D mockup, free.
Made your design with AI?
Generated a concept in Google Gemini, ChatGPT, Claude or Midjourney? Send us your AI image: we rebuild every element onto your box dieline and show you a 3D mockup before you pay, free.Custom die-cut cardboard inserts vs plastic blisters and loose paper shred: which is better?
| Plastic blisters & loose crinkle fill | Custom cardboard inserts from CubitPack | |
|---|---|---|
| Warehouse storage space | Pre-cut foam or plastic trays consume huge pallet volume | Ships 100% flat and pre-scored, saving up to 80% of shelf space |
| Print & color matching | Unprintable foam or clear plastic blister shells | Full CMYK, Pantone match, foil stamping and matte finishes |
| Curbside disposal | Mixed plastic or crinkle shred that customers must sort out | All-fiber paperboard and corrugated that recycles with the box |
| Tooling & die fees | Thermoformed plastic blisters require costly molds | Zero cutting die or printing plate fees with free dieline engineering |
| Product fit | Loose stock dividers that let small bottles rattle | Die-cut to 1/32 in of your exact bottle, jar and tube profiles |
Get custom cardboard inserts sized to your product, with a free 3D mockup before you pay.
Request a Quote →Are cardboard inserts safe and sustainable?
Flute grain direction & bridge stiffness
Our design team aligns corrugated flute grain vertically along load-bearing legs and maintain safe bridge widths so heavy jars never bow the deck.Drop and crush testing for glass
Shipping glass candles or beverage bottles? We offer physical prototypes and drop and crush testing to verify air-cell clearance before full production.FSC paperboard & partner certifications
FSC paperboard and corrugated stocks plus ISO 9001 production are available on request through partner facilities.How do I order custom cardboard inserts?
Tell us what you need
Size, quantities or AI conceptCompare volume pricing
Dedicated account managerApprove your proof
Digital proof + 3D mockupMade and shipped
Free to all 50 statesWhat affects the cost of custom cardboard inserts?
The price depends on four things, and every custom quote is free.
Board grade (card vs flute)
Single-ply folding paperboard costs less per sheet than thick E-flute or B-flute corrugated boardUnfolded flat sheet area
Deep trays with tall folded legs and double roll-over walls use more square inches of boardPrinting & special finishes
Unprinted natural kraft or white board is lowest in cost; full CMYK, Pantone or foil adds a print passOrder quantity
Die-cutting and press setup spread across the run, dropping unit price at 500, 1,000 and 2,500+ piecesTo keep unit cost low while matching a printed mailer box, flood-print the cardboard insert in one solid Pantone brand color with white knockout text, or use natural brown kraft corrugated with white ink. Compare three quantities in Step 1 of the quote form; you pay zero die or plate fees and get 10% off your first order. Buyers ordering bulk custom cardboard inserts, personalized cardboard inserts, custom size cardboard inserts or e-flute corrugated cradle cardboard inserts can compare up to three quantities in one quote.
10% off your first order.
Request a Quote →What do I need to send for a quote?
- The product and how many you need
- The inside size, or what goes in it
- A style, or ask us to suggest one
- Your logo or artwork (an AI image is fine)
- Pantone codes, if you have them
- Delivery ZIP code and the date you need it
Can I see a sample first?
Sample kit
Board and finish swatches, sample boxes, labels and bags. Credited to your first order.Digital proof + 3D mockup
See it before you payPrinted sample
Of your own designHow does shipping work?
- Free shipping to all 50 states
- Worldwide with DDP prices: duties and taxes included
- Blind and split shipping
- Damaged in transit? We reprint the damaged units free
Why brands choose CubitPack
Dedicated specialist
One account manager from quote to deliveryPantone guaranteed
Clearly off? We reprintReprint or refund
If we get it wrong, you chooseBBB accredited
A US business you can checkCardboard inserts questions
Should I choose folding paperboard or corrugated cardboard for my insert?
Choose folding paperboard (16 pt to 24 pt card) for lightweight cosmetics, dropper bottles and retail cartons where a smooth printed surface is priority. Choose E-flute or B-flute corrugated cardboard when holding heavy glass candle jars, beverage bottles or multi-item shipping kits.
Do custom cardboard inserts arrive flat or pre-folded?
They ship flat, die-cut and pre-creased in compact master cartons so they take up minimal warehouse space. Your packing team folds the pre-scored legs in seconds without glue or tape. We also offer full kitting and assembly if you want boxes pre-packed.
How much smaller than the inside of my box should a cardboard insert be?
Our design team sizes the outer Length × Width of a folded cardboard insert 1/16 to 1/8 inch (0.0625 to 0.125 in) smaller than your box's true interior dimensions so the tray drops in smoothly without binding on internal dust flaps.
What is the minimum order quantity for custom cardboard inserts?
Minimums depend on the product, board stock and dimensions; we confirm yours with your quote. Trial orders are reviewed case by case, and you can compare up to three quantities in the quote form.
Can you print full-color artwork, step numbers or foil on a cardboard insert?
Yes. Unlike foam or molded pulp, both folding paperboard and white corrugated inserts can be printed in full color (CMYK), guaranteed Pantone spot colors or white ink on kraft, and finished with matte, gloss, soft-touch, foil stamping or spot UV.
How do interlocking cardboard partition dividers work for bottles and jars?
Interlocking partitions consist of precision-slotted lengthwise and crosswise cardboard strips that slide together like a grid to form 4, 6, 9, 12 or 24 individual cells. They ship flat and prevent glass jars or cans from touching in transit.
Can a cardboard insert hold products of different heights at the same top level?
Yes. By engineering stepped fold lines or a secondary support shelf underneath shorter items, we raise the floor beneath a shallow cream jar while letting a tall lotion bottle sit deeper so both tops align flush.
Do you charge cutting die fees for custom cavity shapes?
No. CubitPack never charges cutting die or printing plate fees. Our structural designers create your custom insert dieline, 2D proof and interactive 3D mockup for free before payment.
Should I send physical samples of my jars or tubes for dieline engineering?
For straight cylinders and rectangular cartons, exact caliper measurements in inches or millimeters are enough to draft your dieline. For contoured perfume bottles or complex 6-piece kits, you can send samples or order a physical prototype to verify fit.
How long do custom cardboard inserts take to manufacture and ship?
Standard production takes 10 to 14 business days after you approve your digital proof and 3D mockup and complete payment. Rush production in 4 to 5 business days is available for a quoted fee, and shipping to all 50 US states is free.
Still have a question? Ask a packaging specialist.
Request a Quote →Cardboard inserts terms, explained
- Riser platform
- A flat die-cut paperboard deck supported by folded side legs that elevates products inside a box
- E-flute corrugated
- Thin 1/16 in fluted corrugated board that combines crush protection with clean die-cutting and printing
- Air-cell buffer
- An empty perimeter gap formed by folded cardboard walls that absorbs shock before it reaches glass
- Interlocking partition
- Slotted cardboard strips that assemble at right angles to form a multi-cell bottle grid
- Neck-lock tab
- A creased paperboard collar that clips around a bottle neck to stop vertical movement
- Score line
- A pressed crease rule in the cardboard that lets packers fold 90-degree legs cleanly without cracking
More for your cosmetics packaging
Learn more
Get your cardboard inserts price
One dedicated account manager prepares pricing across up to 3 quantities.
- Free design & AI-to-print studio + 3D mockup
- No die or plate charges · 4–5 day rush available
- Free shipping to all 50 states
- 10% off your first order
- Reprint or refund if we get it wrong
Every CubitPack fact on this page comes from our confirmed offers (cardboard and corrugated box inserts, 10-14 business day turnaround, free structural design and free 50-state shipping) and was checked by a packaging specialist. Score allowances, flute orientation and partition clearances follow standard TAPPI and ISTA guidelines. Spot something wrong? Tell us and we will fix it. Tell us if something looks wrong.
Sources
- All CubitPack offers, Card insert style, cavity options (1, 2-4, 5-12, 13+), 10-14 business day turnaround (4-5 day rush), free structural design and free 50-state shipping
- Paperboard score-to-score folding clearances and corrugated flute compression standards
- Suspended air-cell perimeter buffer zones and interlocking glass bottle partition standards
What changed
- October 22, 2026: First published.
- October 22, 2026: Updated specifications, terminology, and verified source links.