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EVF11103

Snap-Lock Bottom Box with Tuck Top

Available in a wide range of custom configurations & material selection.
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Product details

Top highlights

Manual 1-2-3 interlocking bottom assembly
Friction tuck top with thumb cut for easy opening
Delivered flat with a pre-glued side seam

About this product

A straight-line glued folding carton featuring a secure 1-2-3 snap-lock base and a friction tuck lid. Delivered flat, this box provides a stronger floor than a standard tuck carton while avoiding the multi-point gluing steps of an auto-bottom design.

The bottom closure relies on four interlocking flaps that are manually folded during packing, making it a practical choice for retail goods that benefit from bottom security but are packed by hand.

Common uses

Cosmetics and skincare jars
Pharmaceutical bottles
Retail hardware or electronics

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Retail displays and medium-weight consumer goods

Cosmetics and skincare

Provides a clean retail presentation with a base strong enough to hold glass jars or heavy bottles without slipping open.

Pharmaceuticals and supplements

The friction tuck top allows for easy repeated access, while the snap-lock bottom keeps heavier contents secure on the shelf.

Light hardware and electronics

Offers better retention for dense, compact items than a standard tuck bottom, provided the board caliper is matched to the product weight.

Retail food and confectionery

Provides a flat, stable base for standing pouches or wrapped treats on store shelves, while the tuck top allows easy consumer access.

Hand-packing operations and retail rollouts

Hand-packing operations

The 1-2-3 bottom involves folding four flaps in sequence. This takes more time than an auto-bottom but provides a secure base for manual fulfillment lines.

Cost-conscious retail rollouts

Because the side seam only involves a straight-line folder-gluer, manufacturing is often simpler than producing pre-glued crash-lock bases.

Medium-volume production runs

When order quantities are too low to justify the setup of multi-point gluing for crash-lock bases, the straight-line glued snap-lock offers a practical middle ground.

When to compare standard tucks or crash-lock bases

High-speed automated packing

Standard automated cartoning lines often require a different base. If packing speed is the priority, evaluating a crash-lock carton may be worthwhile.

Very light items

If the product is lightweight and bottom security is not a concern, a standard straight tuck or reverse tuck carton will be faster to pack.

Parcel shipping

The friction tuck and snap-lock base may open during rough transit. For direct courier delivery, an outer shipper or secure taping is often recommended.

Board caliper, grain direction, and closure security

Board caliper and lock tolerances

The snap-lock base relies on precise cuts to interlock securely. Changing the board thickness means recalculating these clearances so the bottom neither binds nor falls open.

Grain direction

Grain should typically run horizontally around the carton to prevent the main panels from bowing outward, which could compromise the friction tuck and the base lock.

Packing line labor

Because the four bottom flaps are folded by hand, assessing your fulfillment team's capacity is important before committing to this style.

Top closure security

The friction tuck relies on board tension to stay closed. If the product exerts outward pressure, a slit-lock top or added seal might be a safer choice.

Dust flap profiles and thumb cut sizing

Dust flap profiles

The top dust flaps can be configured with flat edges, chamfered corners, or line extensions to control how they interact with the lid and the product.

Thumb cut sizing

The semi-circular cutout on the front panel can be adjusted to balance easy finger access with the desired visual presentation.

Snap-lock catch clearances

The interlocking tabs can be adjusted to accommodate different board thicknesses, ensuring the base locks firmly without tearing the material.

Packing details

Production layout efficiency

For high-volume runs, the flap angles can be adjusted into a 'paired' layout, allowing blanks to nest closely on the die-cutting sheet and reduce board waste.

Paired nesting and flap edge variants

EVF11103#2

Introduces configurable edge types for the top dust flaps, allowing for chamfered or extended profiles.

EVF11103#2P

A paired design where the dust flaps and snap-lock tabs are angled to interlock when nested on a production sheet, maximizing material efficiency.

Additional notes

Board thickness and lock tolerances

The geometry of the snap-lock catches is highly sensitive to material thickness. If you change board grades, the cut clearances should be updated to ensure the base locks correctly.

FAQs

Does the bottom use tape or glue?

The 1-2-3 snap-lock bottom interlocks mechanically to form a secure base. However, if the carton is used for parcel shipping, an outer seal or master shipper may be recommended.

Is this box suitable for automated packing lines?

The four-step folding sequence for the bottom is designed for manual hand-packing. Automated lines typically run an auto-bottom or standard tuck closure.

How is this carton delivered?

It is die-cut, creased, and glued along one side seam by the manufacturer, then shipped flat to your packing facility.

How does the paired layout affect my order?

For larger production runs, the flaps can be angled to nest closely on the cutting sheet. This reduces board waste and can improve material efficiency.

Can this hold heavy products?

It holds more weight than a standard tuck bottom, but the limit depends entirely on the board thickness and the specific product. Heavy items may cause the interlocking flaps to bow or disengage, so physical testing is recommended.

What is the purpose of the thumb cut?

The small semi-circle on the front panel gives the user a place to grip the friction tuck flap, making the carton easier to open without tearing the board.

Can I use this carton for direct shipping in the mail?

This style is designed for retail display and hand-packing. The friction top and snap bottom may open during rough transit, so an outer shipping box is recommended for parcel networks.

What happens if I change the board thickness later?

The snap-lock base relies on precise cut clearances to interlock. If you switch to a thicker or thinner board, those clearances should be recalculated so the bottom continues to lock correctly.

Is it faster to pack than a standard tuck box?

It takes slightly longer to assemble because the four bottom flaps are folded in sequence. However, it provides a much stronger floor for the product once locked.