Variation

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EVF22030

Triangular Slice Box

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

Top highlights

Distinctive triangular footprint for slices and novelty items
Un-glued construction with a friction-locking narrow tip
Delivered flat for space-saving storage before use

About this product

The triangular slice box is a specialty folding carton designed for single portions of cake, pie, or uniquely shaped retail items. Delivered flat and assembled entirely by hand without glue, it uses a specialized tongue-and-slit lock at the narrow tip to hold its shape.

Because it relies on friction locks rather than adhesive, this carton trades automated packing speed for a distinctive presentation. It is an excellent fit for bakery counters and promotional kits where the visual impact justifies the manual assembly time.

Common uses

Bakery and cafe counters (cake, pie, pizza slices).
Specialty confections and chocolates.
Promotional kits and novelty retail packaging.
Event and catering favors.

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Product Fits For The Triangular Carton

Bakery and cafe counters

Designed specifically for slice-shaped products. The hinged lid allows easy top-loading of delicate items like cake or pie, while the triangular footprint prevents the product from shifting.

Specialty confections and gifts

The unique geometric shape stands out on retail shelves. Multiple boxes can be arranged in a circle to form a complete presentation for gift sets or assortments.

Promotional and novelty retail

Provides a memorable unboxing experience for lightweight promotional items, cosmetics, or apparel accessories that benefit from non-standard packaging.

Event and catering favors

Useful for weddings, parties, or corporate events where individual slices or triangular gifts are handed out to guests.

Retail And Bakery Environments

Food service operations

For direct contact with baked goods, the carton should be produced using food-safe paperboard, often paired with a grease-resistant or moisture-barrier coating on the interior.

Boutique retail

The large, unbroken triangular top lid provides an excellent primary display surface for branding, foil stamping, or high-quality graphics.

Corporate gifting

The distinctive shape helps PR kits and corporate gifts stand out, trading standard rectangular efficiency for a memorable presentation.

Situations That Point To Other Box Styles

High-volume automated packing

This carton relies on manual assembly, including aligning the narrow tip and engaging the tongue lock. If packing speed is the primary concern, a glued, auto-erecting rectangular carton is often a better choice.

Heavy or liquid-heavy items

Because the walls are held together by friction locks rather than glue, heavy outward pressure can cause the locks to pop open. Heavy items usually point to a glued structure.

Parcel shipping

Friction closures and the pointed tip are vulnerable in mixed-carrier networks. If shipping direct to consumers, this carton should be placed inside a protective outer corrugated shipper.

Board Choice And Assembly Planning

Board caliper and tear resistance

The locking mechanism at the narrow tip relies on a board that is thin enough to fold cleanly but strong enough not to tear when the tongue is inserted. High-quality folding boxboard (FBB or SBS) is often recommended.

Manual assembly labor

Fulfillment teams should budget time for hand-erecting each box. The process involves folding the side walls, engaging the tip lock, folding the back wall, and securing the lid tucks.

Food contact and barrier coatings

If the box will hold moist or greasy items like cake, the board choice and interior coating should be evaluated for food safety and grease resistance.

Print layout and orientation

The triangular lid offers a unique canvas, but artwork must be oriented carefully to ensure logos and text read correctly when the box is displayed point-forward.

Adjusting The Tip Angle And Proportions

Tip angle sharpness

The acute angle at the front of the slice can be adjusted to match the product. However, extreme angles require careful tuning of the tongue lock dimensions to ensure it remains functional and secure.

Lid window cutouts

A window can be added to the top lid for product visibility. This slightly reduces the rigidity of the lid and may involve a film patching process during manufacturing.

Tongue lock tuning

The width of the slit and the length of the tongue lock are highly sensitive to the exact thickness of the chosen paperboard. Changing board grades often involves adjusting the lock geometry to maintain the right friction.

Packing details

Nesting and material efficiency

The irregular, chevron-like shape of the flat blank means it will not nest as tightly on a printing sheet as standard rectangular cartons, which can lead to higher offcut waste.

Back Wall Variations

Overlapping Back Wall (EVF22030_1)

Instead of a single back wall folding up from the base, this variant forms the back wall by folding extensions from the two side walls inward and locking them together with a second tongue-and-slit mechanism. This changes the assembly sequence and adds a locking step at the rear.

Additional notes

Assembly labor and fulfillment speed

Because the operator must carefully align the narrow tip and insert the tongue lock before closing the lid, this carton takes longer to assemble than a standard crash-lock or straight-tuck box.

Blank nesting and material waste

The triangular geometry creates an irregular flat blank. Buyers should expect slightly higher material waste during die-cutting compared to standard rectangular boxes.

FAQs

Can this box be assembled on an automated line?

No. The asymmetric fold sequence and the friction-based tongue locks require human dexterity. It is erected by hand.

Can I use corrugated board for this box?

Standard corrugated flutes are generally too thick for the intricate tongue-and-slit lock at the narrow tip, causing the board to bind or crush. It is designed for folding carton board (FBB/SBS).

Does this carton require tape or glue?

No. The carton is delivered as a flat, un-glued blank. It holds its 3D shape entirely through a tongue lock at the front tip and friction tuck flaps on the lid.

Is this box safe for direct food contact?

That depends entirely on the paperboard and coating you select. If packing moist or greasy bakery items, you will want to specify a food-safe board with an appropriate barrier coating.

Can I ship this box through the mail?

Not on its own. The friction locks will likely pop open during rough transit. For e-commerce or parcel delivery, this carton should be packed inside a sturdy outer shipping box.

Can the sharpness of the front tip be changed?

Yes, the angle can be adjusted to fit wider or narrower slices. However, significant changes to the angle mean the locking tabs should be re-tested to ensure they still hold securely.

How does the front tip stay closed?

It uses a specialized tongue-and-slit lock that holds the two side walls together under tension, eliminating the need for adhesive.

Can I print on the inside of the box?

Yes, the flat-shipping blank allows for two-sided printing, which is useful for branding or adding instructions inside the lid.