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EVF11101

Snap-Lock Bottom Tuck Carton

  • 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

  • Manual 1-2-3 interlocking base
  • Tape-free top tuck with slit locks
  • Ships flat (KD) with pre-glued side seam

About this product

The snap-lock bottom carton, often called a 1-2-3 bottom, is a retail-ready folding box designed for secure presentation without tape or glue at the packing station. It features a regular tuck top with slit locks for a clean closure, while the base interlocks manually to support light-to-medium consumer goods.

Because the side seam is pre-glued by the manufacturer, the carton ships flat and pops open easily. The primary tradeoff is packing labor: the interlocking base requires a few seconds of manual folding per box, making it efficient to manufacture but slower to pack than a pre-glued auto-bottom.

Common uses

  • Cosmetics and skincare
  • Pharmaceuticals and supplements
  • Lightweight electronics
  • Retail shelf displays

Get a quote

Share what you know. We'll take it from there. Or email us at info@herculeindustrial.com

Best Price Guarantee

Already have a packaging quote? Let us beat it.

Send us the quote you have. We will beat it for the same specifications, quantity, and delivery requirements.

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Free quote review. No obligation.

30+specialist partner plants

We supply through the plant best suited to your price, material, production, and delivery requirements.

Why we can beat a lower quote

30+ plants give us more ways to lower the price.

Each plant has different machinery, material costs, order minimums, and freight rates. Our buying volume helps us secure better pricing. We then quote through the plant that gives you the lowest total price for your requirements.

Send us your current quote. Watch us beat it.

Attach it to the quote form or email it to us. We'll review it free and send you our price.

Upload a competing quoteinfo@herculeindustrial.com
Best Price Guarantee terms

To qualify, send a written supplier quote dated within the past 30 days and addressed to your company. It must cover the same dimensions, construction, material, print, finish, quantity, tooling, freight, delivery date, and delivery location. The guarantee does not cover taxes, expired quotes, liquidation or clearance sales, or obvious pricing errors.

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Retail and Lightweight Consumer Goods

Retail Shelf Packaging

The clean front panel and secure top tuck make this an excellent choice for cosmetics, pharmaceuticals, and small electronics. The interlocking base provides a flat, stable floor for standing upright on shelves.

Manual Kitting and Assembly

For operations where products are packed by hand, the snap-lock base offers a good balance of security and cost. It holds more weight than a standard tuck bottom without requiring the specialized gluing setup of a crash-lock base.

Lightweight Jars and Bottles

Skincare products, supplements, and small bottled goods benefit from the flat interior floor created by the 1-2-3 bottom, which prevents the product from slipping through the base during handling.

Point-of-Sale Displays

The flat bottom allows the carton to stand securely in retail display trays or on countertops, while the tuck top keeps the primary branding panel free of raw edges.

Fulfillment and Packing Operations

E-commerce and Parcel Shipping

This carton is designed for retail presentation, not rough transit. The friction-fit top and interlocking base can pop open under courier stress, so it should be placed inside a corrugated outer shipper for parcel delivery.

Boutique and Independent Retail

For smaller brands, the snap-lock bottom avoids the higher manufacturing setup associated with auto-bottom cartons, keeping production accessible for shorter runs while maintaining a premium unboxing experience.

Contract Packing Facilities

If using a third-party packer, the manual assembly sequence of the 1-2-3 bottom must be factored into labor time. The three-step folding process is straightforward but slower than popping open a pre-glued base.

When to Consider Auto-Bottoms or Simple Tucks

High-Volume Automated Packing

If your packing line uses automated carton erectors, or if manual packing speed is your primary bottleneck, evaluate a crash-lock (auto-bottom) carton. Crash-locks pop into place instantly, saving labor at the cost of higher manufacturing setup.

Very Light Products

If the product is extremely light and bottom security is not a concern, a standard straight tuck or reverse tuck carton may be faster to assemble and slightly simpler to produce.

Heavy or Fragile Goods

For heavy items that exert strong downward force, the interlocking tabs of a snap-lock base can bow or disengage. In these cases, a corrugated shipper or a glued auto-bottom provides better security.

Board Choice and Lock Clearances

Board Caliper and Lock Friction

The snap-lock base relies on precise clearances to fold and lock without binding. Standard folding boxboard (FBB) or solid bleached sulfate (SBS) works perfectly. If you are considering a thicker micro-flute, the lock geometry must be carefully adjusted to prevent the tabs from tearing or resisting assembly.

Top Slit Locks

The top tuck tongue includes small slit locks that catch the side dust flaps, preventing the lid from opening accidentally. If you prefer a smoother, faster opening experience for the consumer, these locks can be removed in favor of a simple friction fit.

Base Assembly Sequence

The 1-2-3 bottom requires a specific folding order: the large U-shaped flap goes first, followed by the two side flaps, and finally the locking tab is pushed into the center slot. This sequence must be factored into your packing line training.

Print and Finish Areas

Because the side seam requires adhesive, the glue flap must remain free of UV coatings, varnishes, or laminations to ensure a strong bond. Plan your artwork to keep finishes away from this hidden edge.

Top Closure and Layout Adjustments

Paired Nesting Layouts

For high-volume runs, this carton can be configured in a paired layout (nested head-to-toe on the sheet). This reduces material waste during die-cutting, though it requires careful alignment of continuous graphics.

Slit Lock Removal

The slit locks on the top tuck tongue can be removed entirely, leaving a simple friction-fit closure. This makes the carton easier for consumers to open but slightly less secure on the retail shelf.

Dust Flap Modifications

The top dust flaps can be adjusted with chamfered or flat edges to change how they interact with the tuck tongue, improving sift resistance or easing the closing motion.

Packing details

Automated cartoning limits

Because the bottom flaps must be folded and interlocked in a specific sequence, this style is generally incompatible with high-speed automated carton erectors. It is best suited for manual packing lines.

Template Variants

EVF11101#2 (3-Flap Bottom)

A variant where the front panel has no bottom flap, relying entirely on the back and side flaps to form the snap-lock base.

EVF11101#2P (Paired Layout)

The 3-flap bottom variant arranged in a nested, head-to-toe paired layout to optimize material yield on the printing sheet.

Additional notes

Automated cartoning limits

Because the bottom flaps must be folded and interlocked in a specific sequence, this style is generally incompatible with high-speed automated carton erectors. It is best suited for manual packing lines.

Related Folding Cartons

FAQs

What is the difference between a snap-lock and a crash-lock bottom?

A snap-lock (or 1-2-3) bottom requires the packer to manually fold and interlock four flaps to form the base. A crash-lock (auto-bottom) is pre-glued by the manufacturer and pops into place automatically when the carton is opened. Snap-locks are simpler to manufacture but slower to pack.

How much weight can the snap-lock base hold?

It holds more weight than a standard tuck bottom, making it suitable for cosmetics, jars, and small electronics. However, heavy items can cause the interlocking tabs to bow or drop out. Heavy products should be tested with your specific board choice.

Does this carton require special gluing equipment?

The side seam is glued on a standard straight-line folder-gluer, which keeps manufacturing complexity lower than styles requiring multi-point gluing.

Can this be shipped flat?

The manufacturer glues the side seam and delivers the cartons flat (knocked down). You pop them open into a tube shape at the packing station.

Do I need tape to seal the top or bottom?

For retail display, no tape is required. The bottom interlocks mechanically, and the top uses a tuck tongue with slit locks. If shipping directly via parcel courier, an outer shipper or tamper-evident seal is recommended.

Can this be made from corrugated board?

It is primarily designed for paperboard (FBB or SBS). While thin micro-flutes can be used, the added thickness makes the manual snap-lock bottom difficult to fold and increases the risk of the tabs binding.

Is this carton suitable for automated packing lines?

Generally, no. The 1-2-3 bottom requires manual folding and interlocking, which is difficult for standard automated carton erectors to manage. It is designed for hand-packing operations.

How does the top closure work?

The top features a regular tuck lid attached to the back panel. It folds over two side dust flaps and tucks into the front panel. Small slit locks on the tuck tongue catch the dust flaps to keep the lid securely closed.