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EVC11121

Auto-Bottom Box with Edge-Lock Top

Available in a wide range of custom configurations & material selection.
Order 1 sample. Or order 100K+ units. Or anything in between.
Affordable delivery across North America.
Design support, warehousing, testing, assembly available.
Widest machinery capability in America via 30+ specialist partner plants.

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Product details

Top highlights

Pre-glued crash-lock bottom for instant manual assembly
Edge-lock top closure provides a clean, tape-free presentation
Suited for high-volume hand packing, retail, and kitting

About this product

This corrugated box combines a pre-glued crash-lock base with a specialized edge-lock top closure. Delivered flat, the base automatically deploys and interlocks when the opposite corners are pushed together, eliminating the need to manually fold bottom flaps.

The top features a tuck tongue that engages with a slotted edge-lock tab on the front wall. This creates a clean, secure closure without tape, making it an excellent choice for retail presentation, kitting, and fast-paced manual fulfillment lines.

Common uses

High-volume fulfillment
Retail presentation
Kitting
Subscription boxes

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High-volume manual packing and kitting

High-volume manual fulfillment

The auto-erecting bottom reduces labor time per unit, making it efficient for manual packing lines where speed is a priority.

Retail presentation and kitting

The edge-lock top provides a neat, professional appearance without the visual clutter of packing tape, offering a clean unboxing experience.

Subscription and direct-to-consumer boxes

Provides a premium unboxing experience with a clean top closure, though outer shipping may benefit from a clear seal depending on the courier network.

Lightweight consumer goods

The flat outer bottom and secure edge lock make it suitable for shelf display or direct handover to the customer.

Retail presentation and e-commerce fulfillment

E-commerce and direct-to-consumer

Excellent for presentation, though parcel shipping may benefit from a clear wafer seal or outer tape to prevent accidental opening during rough transit.

Consumer goods display

The flat outer bottom and clean top make it suitable for shelf display or direct handover to the customer.

Contract packaging and 3PL

The pre-glued bottom allows packers to open the box instantly, reducing assembly time for large fulfillment runs.

Alternative bottom and closure styles

Automated packing lines

If you use automated case erectors, a regular slotted carton or specialized machine-erected tray is usually required, as this box is designed for manual assembly.

Heavy industrial shipping

For extremely heavy goods where bottom blowout is a severe risk, a fully taped or stitched bottom may offer more security than a glued crash lock.

Standard friction tuck needs

If the specialized edge lock is unnecessary for your presentation, a standard tuck-top crash-lock box may be a simpler choice.

Board thickness and closure security

Board thickness and lock clearances

The edge-lock tab and tuck tongue rely on precise material thickness to function correctly. Thicker boards may cause binding, while thinner profiles generally perform well.

Closure security for transit

Decide if the mechanical edge lock is sufficient for your distribution route, or if an external seal will be added for tamper evidence or parcel shipping.

Production route versus labor savings

The multi-point folder-gluer production route makes the most sense when packing labor savings outweigh the initial manufacturing preparation.

Print surface and finish

The edge-lock tab and tuck tongue are visible upon opening, so consider how your artwork and finish will align across these interlocking panels.

Lock and flap adjustments

Tuck tongue depth

The depth of the tuck flap can be adjusted to change the opening resistance and how deeply it seats into the front slot.

Crash-lock base proportions

The interlocking bottom flaps can be adjusted for different box widths, ensuring the base deploys smoothly without binding.

Edge-lock tab width

The width of the edge-lock tab and the corresponding slot can be modified to increase or decrease the locking strength based on the board grade used.

Packing details

Front inner flap support

The design includes a full-width front inner flap that rests under the main lid. This provides a resting ledge that helps prevent the top from crushing inward under vertical pressure.

Additional notes

Run size and production path

Manufacturing this box requires specialized equipment to fold and glue both the side seam and the complex bottom flaps in one pass. This production route makes the most sense when packing labor savings outweigh the initial manufacturing preparation.

FAQs

Does the crash-lock bottom require tape?

No, the bottom flaps are pre-glued by the manufacturer. When the box is pushed open, they automatically interlock to form a rigid, load-bearing base.

Is the edge-lock top secure enough for parcel shipping?

While the edge lock holds the lid closed securely for handling and retail, single-parcel courier shipping often benefits from a clear wafer seal or a strip of tape over the top to prevent accidental opening if the box is dropped.

Can this box be erected by automated machinery?

This specific design is optimized for fast manual assembly. The crash-lock bottom is meant to be opened by hand.

What board grades work well with the edge lock?

Thinner corrugated profiles are generally recommended. Thicker boards can cause the tuck tongue to bind in the edge-lock slot, making it difficult to close cleanly.

Why choose a crash-lock bottom over a snap-lock bottom?

A crash lock is pre-glued and deploys instantly, saving labor time on the packing line. A snap lock requires the packer to manually fold and interlock the bottom flaps.

How is this box delivered?

It is delivered knocked-down and folded flat. Because the bottom is pre-glued, the flat stack will be slightly thicker at the base than a glued sleeve.

Can the tuck tongue depth be adjusted?

Yes, the depth of the tuck flap can be modified to change the opening resistance and how deeply it seats into the front slot.

How does the front inner flap help the lid?

The front inner flap provides a resting ledge under the main lid. This helps prevent the top from crushing inward under vertical pressure.