← Back to Boxes
Lock-bottom carton main image
ElectronicsFood & beverageFast-moving goodsE-commerce

Lock-Bottom Carton · Auto-Lock Base

Interlocking base tabs for fast assembly, high load and retail or e-commerce batch packaging

Auto-lock base · Fast setup · Stackable and compression-resistant

  • Auto-lock base Interlocking base tabs snap together without tape or glue for fast assembly.
  • Stable load bearing Full-grammage board withstands stacking pressure in warehousing and logistics.
  • Cost-efficient One-piece die-cut blank saves labor and material for high-volume orders.
  • Automation-ready Compatible with auto folder-gluer lines to boost packing efficiency.
  • Crisp print ΔE≤2 color management keeps brand colors consistent for shelf impact.

Applications

Covering retail, e-commerce and fast-moving consumer goods

01

Electronics

Phone cases, earphones, cables and small 3C accessories gain brand presence with a crisp, rigid carton.

02

Food & beverage

Tea, pastries and supplements balance sealing and load for seasonal gift sets and daily retail.

03

Daily FMCG

Cosmetics, toiletries and stationery are easy to open and stack stably for supermarket display.

04

E-commerce shipping

Compression and drop resistance reduce logistics damage while keeping branding intact.

05

Toys & gifts

Small toys, blind boxes and seasonal gifts assemble quickly and cost-effectively for bulk promotions.

06

Office supplies

Pens, notebooks and accessory kits pair clean carton styling with branded printing for corporate programs.

Structure

Base, materials and print customizable to your needs

Lock-bottom structure
Core Structure

Lock-bottom structure

The lock-bottom carton relies on interlocking base tabs. Proper tab angle and length let the base auto-lock once the product is inside, handling vertical pressure while remaining easy to open.

Design Points

Lock-bottom cartons are an efficient solution for retail and e-commerce. Design focus is tab length, angle and engagement depth: too short and the base opens under load; too long and folding becomes difficult. Heavier products can use higher grammage board or rear-lock designs; auto folder-gluer lines need proper gripping and folding angles.

01

Front lock-bottom: front and rear tabs fold first — simplest and most versatile

02

Rear lock-bottom: rear tab locks first, shifting the load point rearward for heavier items

03

Auto lock-bottom: tabs auto-engage during machine folding for high-speed lines

Customization Tips
  • FMCG commonly uses 300–350 gsm white card; heavier 3C accessories benefit from 400 gsm+ or corrugated lamination
  • Leave 1.5–2 mm engagement allowance for stability and easy folding
  • Top closure can include a tear strip for e-commerce security and easy opening
  • Add a PET/PVC window to the front panel to display the product
Auto-lock baseCompression-resistantCompatible with auto packing lines

Board materials

Wrapped greyboard: thick and crisp for mid-to-high-end products

Folding white card: light and economical for FMCG

Corrugated board: cushioning for heavier or fragile products

Surface finishes

Matte/gloss lamination: improves abrasion resistance and hand feel

Hot foil stamping: highlights brand logo and selling points

Spot UV: adds visual depth and texture

Insert fixation

EVA insert: precision slots, shock and scratch resistant

Paper/plastic tray: economical and eco-friendly for light products

EPE foam: cushioning for fragile items

Sizing

Length, width and height tailored to product and insert dimensions

Tab length can be adjusted to change load capacity

Closure and opening

Top tuck closure: common economical option

Tear strip: suited to e-commerce anti-tamper opening

Window: displays the product and increases shelf appeal

Handles and accessories

Optional plastic or paper handle for easy carrying

Can include liner card or instruction pocket

Need a custom Lock-Bottom Carton solution?

Tell us size, material, quantity and finish requirements; our engineers reply with quote and structural advice within 2 hours.

Get a Quote Now

💡 Try: gift box, carton, paper bag, hang tag, UV, foil...