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EVF22031

Triangular Tray with Hinged Lid

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.
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Product details

Top highlights

Triangular footprint for slice-shaped or specialty products
Glue-free manual assembly with a four-tab locking lid
Delivered flat to minimize inbound shipping volume

About this product

This one-piece triangular folding carton features an attached hinged lid that secures without glue. Instead of a standard friction tuck, the lid's side flaps overlap the base and lock into place using four precise tuck tabs, creating a clean, self-contained package.

Delivered flat and assembled by hand, its unique geometric footprint makes it a strong choice for specialty retail, cosmetics, and slice-shaped food products that need to stand out on the shelf.

Common uses

Specialty cosmetics
Pie or cake slices
Pizza slices
Unique promotional kits

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Retail and Specialty Packing Jobs

Slice-Shaped Food Presentation

The triangular footprint naturally accommodates pie slices, cake portions, or specialty pizza slices. When specified with a food-safe board and coating, it provides a fully enclosed presentation for bakery and deli counters.

Specialty Cosmetics and Promotional Kits

For products that get lost in standard rectangular boxes, the angled panels offer a distinct unboxing experience. The large, flat top and bottom panels provide an uninterrupted canvas for high-end litho-lamination or foil stamping.

Single-Serve Confectionery

Useful for individual chocolates, fudge, or artisan candies. The glue-free tab closure keeps the lid secure while allowing the consumer to open and reclose the package easily.

Geometric Retail Displays

The triangular shape allows multiple cartons to be arranged in circular or alternating patterns on a retail shelf, creating a visually striking display without requiring custom inserts.

Product Types and Retail Environments

Hand-Packed Retail Operations

Because the carton relies on a multi-point tab-and-hole locking system, it must be folded and closed by hand. It fits well in operations where packing speed is less critical than the final retail presentation.

Boutique and Artisan Brands

The unique shape and manual assembly align well with low-to-medium volume artisan products, where the unboxing experience and shelf differentiation justify the hand-packing time.

Limited-Run Promotional Campaigns

Delivered flat and assembled without adhesive, this tray is easy to store and set up on demand for special events, press kits, or seasonal product launches.

When to Consider a Different Carton Style

High-Speed Automated Packing

The four individual tuck tabs require manual dexterity to seat properly. If your packing line relies on automated folder-gluers or high-speed carton erectors, a standard crash-lock or glued-corner tray will be much more efficient.

Direct-to-Consumer Courier Shipping

This carton is designed for retail shelves and direct hand-offs. The tab closures and flat triangular panels may require an outer shipping box or rigid mailer to protect the product during mixed-carrier transit.

Board, Fit, and Production Choices

Board Caliper and Lock Hole Sizing

The security of the lid depends on the tuck tabs fitting precisely into the lock holes. If you change the board thickness, such as moving from a standard folding boxboard to a thicker micro-flute, the lock hole dimensions must be updated to match, or the tabs will tear or fail to hold.

Nesting Efficiency and Material Yield

Triangular blanks do not nest as tightly on a standard sheet of paperboard as rectangular cartons do. Discuss layout options with your converter, as interlocking the triangles efficiently is key to managing material waste.

Print Surface and Scuff Protection

The large, flat triangular lid provides an excellent continuous surface for branding. However, because it sits perfectly flat, it is exposed to scuffing if stacked. Consider a protective varnish or coating if the cartons will be stacked heavily in retail displays.

Food Contact and Coating Requirements

If packing bakery or deli items, the structural design is only part of the solution. You must specify a board grade and barrier coating that are certified for direct food contact by your converter.

Adjusting the Triangular Template

Triangle Base Angles

The template is not restricted to an equilateral triangle. The base angles can be adjusted to create isosceles or custom triangular footprints to match specific product dimensions, provided the angles sum correctly.

Tab and Tongue Dimensions

The width and height of the locking tabs can be modified to increase closure security for heavier products or to make manual insertion easier for the packing team.

Dust Flap Height

The rear dust flaps can be extended to improve corner coverage, reducing the risk of small items or crumbs slipping out near the hinge.

Packing details

Panel Bowing on Large Footprints

Because the top and bottom panels are large, unsupported triangles, they can bow if the carton is scaled up to a larger size. Selecting a stiffer board grade or aligning the grain direction carefully helps keep the panels flat.

Additional notes

Closure security

The four-tab closure provides a clean presentation, but it is not tamper-evident. If tamper evidence is required for retail, consider adding a branded label or clear wafer seal over the opening edge.

FAQs

Does this carton require glue or tape to stay closed?

No. The carton uses a mechanical closure. Four tuck tabs on the lid's side flaps insert into corresponding lock holes on the base, securing the package without any adhesive.

Can this tray be set up on an automated packing line?

This specific design is intended for manual assembly. The multi-point tab-and-hole locking sequence is difficult to mechanize, making it a practical choice for hand-packing operations.

Is this box safe for direct food contact?

The structural design accommodates food slices, but food safety depends entirely on the material you choose. You must specify a board grade and coating that are certified for direct food contact by your converter.

Can I use a thicker corrugated board for this tray?

While possible, moving to a thicker micro-flute requires adjusting the template. The lock holes and tuck tabs are tightly synchronized with the material thickness, and failing to adjust them will cause the closure to bind or pop open.

Can I ship this carton directly in the mail?

The tab closures and flat triangular panels are designed for retail presentation. For courier transit, the carton requires a sturdy outer shipping box to protect the product and prevent the tabs from catching.

Why might this carton have higher material waste than a standard box?

Triangular flat blanks leave more irregular gaps when laid out on a large rectangular sheet of paperboard compared to standard square boxes. Careful interlocking during the die-cutting layout helps minimize this waste.

How are these cartons delivered?

The cartons are delivered flat (knocked down). This minimizes inbound shipping volume and requires less storage space before they are assembled for packing.

Can the triangle angles be changed to fit a specific product?

Yes. The base angles can be adjusted to create isosceles or custom triangular footprints, as long as the geometry allows the lid to fold and lock correctly.