Corrugated Boxes That Don't Collapse in Ice, Meltwater or Cold-Chain Humidity
3RBOX makes waterproof corrugated boxes from mineral-based stone paper — a tree-free sheet that does not absorb water. Direct from our own material and box production in Guangzhou, with custom size, flute, drainage and full-colour printing.
- Rigid after direct ice & meltwater contact
- Chilled 0–4 °C and frozen −18 °C distribution
- Custom size, flute, drainage & hand holes
- Full-colour retail-grade printing
- MOQ from 3,000 pcs per SKU
- Custom samples in about 7–15 days
Where standard packaging fails — and what changes
Six problems we hear every week from seafood exporters, produce packers and cold chain logistics buyers.
Cartons collapse when meltwater or condensation soaks through.
Non-absorbent mineral sheet keeps panels rigid after direct water contact.
Stacked pallets sag in the cold room and crush the bottom layer.
Flute and wall structure engineered to your stacking height and load.
EPS foam is bulky, unprintable and increasingly restricted at destination.
Flat-packed, fully printable, tree-free and plastic-foam free.
Plastic hollow board can't carry retail-grade branding.
Smooth printable surface for full-colour brand and export markings.
Trading companies can't change structure or hold price.
We make the stone paper material and the boxes in-house.
Buyers now ask for a credible sustainability story.
Tree-free, mineral-based, reusable in many supply chains.
Water contact, ice contact, cold room stacking
The three conditions that destroy ordinary cartons — and the three conditions these boxes are designed for.
Water runs off, not in
The mineral sheet does not wick moisture, so panels keep their strength instead of softening.
Direct ice & wet product
Used for whole fish, shrimp and shellfish packed straight onto ice, with optional drainage.
Cold room stacking
Flute and wall spec matched to your pallet pattern and stacking height.
Technical specification at a glance
Typical configuration ranges. Final specification is confirmed against your product, loading weight and transit conditions.
| Material | Stone paper (calcium carbonate + resin binder) corrugated sheet |
|---|---|
| Typical thickness | 2–7 mm, single-wall or double-wall |
| Flute options | E / B / C / EB, selected by loading weight and stacking height |
| Water behaviour | Non-absorbent surface; panels stay rigid after direct water and ice contact |
| Temperature range | Suitable for chilled 0–4 °C and frozen −18 °C distribution |
| Loading weight | Typically 5–25 kg per box — confirmed per structure and flute |
| Printing | Up to full-colour, logo, batch area, handling and export markings |
| Options | Drainage perforation, ventilation holes, hand holes, inserts, dividers, lids |
| Sizes | Fully custom; tooling made to your internal dimensions |
| Packing | Flat-packed in bundles, export pallets or cartons |
Send these 8 details for an accurate quote
- Product being packed (e.g. whole fish on ice, table grapes, frozen shrimp)
- Internal box size L×W×H in mm
- Loading weight per box
- Annual or monthly quantity per SKU
- Transit temperature and duration
- Ice / water contact: yes or no
- Printing: none, 1 colour, or full colour
- Current packaging you want to replace
Stone paper vs. cardboard, PP hollow board and EPS foam
An honest side-by-side so you can check the trade-offs before you switch.
| Feature | 3RBOX Stone Paper Corrugated | Traditional Cardboard | PP Corrugated / Hollow Board | EPS Foam Box |
|---|---|---|---|---|
| Water resistance | High | Low | High | High |
| Moisture resistance | High | Low | High | Medium |
| Compression strength | High | Medium | Medium | Low |
| Reusability | Good | Limited when wet | Good | Limited |
| Recyclability | Depends on local systems | Broad | Plastic stream | Restricted in many markets |
| Printing & branding | Smooth printable surface | Good | Limited | Very limited |
| Sustainability positioning | Tree-free, mineral-based | Wood pulp based | Plastic based | Disposal concerns |
| Typical applications | Seafood, produce, cold chain, export | Dry goods, retail | Reusable transport, industrial | Insulated cold chain, seafood |
| Best-fit buyer needs | Waterproof + sustainability story | Low-cost dry packaging | Durable plastic transport | Short-term insulation |
Where deep thermal insulation is the priority and the cold chain is not maintained by refrigerated transport, EPS may still be the right answer. We will tell you when stone paper is not the best fit for your route.
From requirement to shipment in four steps
Send your requirement
Product, box size, loading weight, quantity, transit temperature.
Structure recommendation
We propose thickness, flute, drainage and closure within 1 business day.
Sample & approval
Custom sample in ~7–15 days for your own drop, load and wet testing.
Production & export
Mass production with pre-shipment inspection, export packing and documents.
Where waterproof corrugated boxes are used
What we can change for your project
- Internal dimensions & tooling
- Sheet thickness & flute type
- Single-wall or double-wall
- Drainage perforation
- Ventilation pattern
- Hand holes & carry design
- Lids, trays and telescopic boxes
- Inserts, dividers and pads
- Full-colour or spot printing
- Batch / label / export marking areas
- Pallet pattern optimisation
- Flat-pack export packing
Questions buyers ask before ordering
Still have a question?
Send your product, box size and transit conditions — our packaging engineers reply with a recommended structure, price and sample plan within one business day.
Have the full specification ready?
Fill in as much as you know and our packaging engineers will come back with a recommended structure and price. Prefer to talk first? Message us on WhatsApp or email — both reach the same team.
Guangzhou 3RBOX Green Packaging Technology Co., Ltd
1601, Building B3, CIMC Greater Bay Area International Talent Entrepreneurship Park, No. 42, Dongzhong Road, Huangpu District, Guangzhou, China
Test it before you commit — request a free sample box
Load it, ice it, soak it, stack it. Send us your product type, box size and quantity and we will get a sample on the way.