Zero EPS Foam.
Zero Waxed Waste.
Molded Fiber Cold Chain Shippers.
Curbside-recyclable molded fiber cold chain packaging engineered for refrigerated reefer-controlled lanes. Maintains 0°C to 4°C chilled transit while recovering up to 80% of warehouse floor space through 5:1 compact nesting.
Two Precision Formats. Immediate Qualification.
Standardized high-compression molded fiber formats engineered for direct drop-in EPS cooler replacement.
Fiber Box Medium (11.6 Qt)
- Usable Volume
- 11.6 Quarts (~2.9 Gal)
- Rated Payload
- ~11.0 lbs (5.0 kg)
- Exterior Dimensions (OD)
- 15.4" × 11.5" × 6.7"
- Pallet Density
- 240 Boxes / Pallet (5:1 Nested)
Fiber Box Large (27.5 Qt)
- Usable Volume
- 27.5 Quarts (~6.9 Gal)
- Rated Payload
- ~22.0 lbs (10.0 kg)
- Exterior Dimensions (OD)
- 23.3" × 15.4" × 6.7"
- Pallet Density
- 120 Boxes / Pallet (5:1 Nested)
Transit Lanes & Packout Guidance
Refrigerated Linehaul (34°F to 40°F)
Commercial B2B fleet logistics for fresh seafood and wholesale protein. Ships bare on pallets inside refrigerated trailers without corrugated overpacks.
- Packaging Format
- Bare 2-piece box + interlocking friction lid
- Coolant System
- Commercial gel packs or soaker pads
- Thermal Window
- 48+ hours at 0°C to 4°C in reefer transit
- Stacking Rating
- 5-high palletized reefer load (100 kg proof)
- Moisture Resistance
- Internal AKD sizing resists chilled condensation
Summer Ambient Parcel (68°F to 85°F)
Single-pack ground courier transit (UPS / FedEx) for direct-to-consumer perishable protein and meal kit fulfillment.
- Packaging Format
- Fiber Box nested inside standard RSC outer carton
- Coolant System
- 10 lbs (Medium) / 17 lbs (Large) sealed gel packs
- Thermal Window
- 24 hours below 4°C (39°F) in 85°F ambient
- Insulation Value
- System R-3.0 thermal barrier
- Line Assembly
- Pre-formed 2-piece drop-in (replaces multi-panel liners)
Frozen Perishable Transit (Dry Ice Sublimation)
Sub-zero deep freeze transit for frozen seafood, meats, specialty ice cream, and clinical biological samples.
- Packaging Format
- Direct Fiber Box packout with dry ice blocks or pellets
- Operating Temperature
- -78.5°C (-109.3°F) sublimation
- Thermal Window
- 48 to 72 hours deep frozen holding
- Cryo Fracture Resistance
- Cellulose matrix retains toughness at -80°C (no bead cracking)
- Vapor Management
- Permeable rim vents CO₂ gas with zero pressure blowout
Engineering Specifications
48+ Hours at 0°C to 4°C (32°F to 40°F)
- Reefer Linehaul Hold
- 48+ hours at 0°C to 4°C in chilled lane
- Profile Standard
- Cold chain thermal curve verified in reefer transit
- Approved Coolants
- Commercial gel packs, chilled packouts, soaker pads
- Moisture Leaching
- Internal AKD sizing resists chilled condensation
5:1 Pallet Nesting Ratio
- Pallet Density
- 240 units / pallet (Med) • 120 / pallet (Lrg)
- Inbound Freight Ratio
- 1 truckload nested fiber = 5 truckloads EPS foam
- Floor Space Reclaimed
- 80% warehouse footprint recovered
- Line Staging
- Direct line-side staging on single pallet
PFAS-Free Internal AKD Sizing
- Recyclability Standard
- 100% Curbside Paper Recyclable (PAP 21)
- Repulpability Protocol
- PTS-RH 021/97 blue-bin certified
- FDA Food Contact
- 21 CFR 176.170 & 176.180 wet/fatty contact
- Fluorine Content
- Non-detect (zero PFAS, zero paraffin wax)
100 kg Proof Load • 5-High Stacking
- Stacking Rating
- 5-high commercial reefer pallet loading
- Dynamic Proof Load
- 100 kg proof load rating per corner
- Impact Resilience
- Intertwined fibers absorb shock (no brittle bead fracture)
- Lid Closure
- Precision friction-fit rim (zero tape required)
Stop paying for air: Warehouse & freight savings vs rigid EPS.
Rigid EPS foam coolers cannot nest: you pay full linehaul rates to truck and warehouse 80% empty air. Fiber Box nests 5:1 to reclaim floor space and eliminate 4 out of 5 inbound freight trucks.
Ready to eliminate these empty trucks and reclaim your warehouse floor?
Unit pricing is strictly confidential. Request an evaluation kit to test physical payload holding directly on your operating packing line.
Replacing Waxed Corrugated?
Waxed corrugated blanks pack flat, so the ROI is not freight cube: it is eliminating manual box-folding labor on your line, preventing soggy bottom collapse in humid chilled freight lanes, and eliminating 100% of landfill tipping fees and non-recyclable EPR penalties.
How Fiber Box Compares to Incumbents
Compare the physical footprint, thermal performance, regulatory exposure, and recovery streams across the three primary cold-chain formats.
Pallet Density: 5:1 Inbound Volume Advantage
240 Boxes / Pallet
5:1 Nested Pallet Profile
Nested RENW Fiber Box Pallet
80% Space SavedEngineered draft angle allows compact 5:1 nesting. A single standard 48"×40" pallet position stages 240 complete box bases and lids directly adjacent to your packing line.
48 Coolers / Pallet
1:1 Rigid Air Blocks
Bulky Incumbent EPS Foam Pallet
Empty Air StorageRigid, non-nestable EPS foam coolers consume warehouse volume as empty air. The same pallet footprint holds only 48 units, forcing plants to warehouse bulky staging stacks or pay for daily floor replenishment.
Stop paying warehouse rent to store empty air: 1 inbound truck of nested fiber replaces 5 trucks of rigid foam.
| Performance Vector | Legacy EPS Foam | Waxed Corrugated | RENW Fiber Box |
|---|---|---|---|
| Warehouse & Inbound Density | 1:1 Rigid Air Blocks Zero nesting draft. Takes up ~80% empty warehouse volume. | Flat Pack Sheets Requires box erecting, folding, and manual taping labor. | 5:1 Compact Nesting Reclaims 80% warehouse space; 1 inbound truck replaces 5 EPS trucks. |
| Reefer Transit Thermal Hold | Chilled Hold Good insulation, but brittle beads fracture under impact. | 12 to 24 Hours Max Poor insulation. Condensation saturates cardboard fluting. | Reefer 0°C to 4°C Hold Stable thermal buffering in refrigerated transit with commercial gel packs. |
| Chilled Transit Structural Rigidity | Rigid Shell Retains shape, but cracks create catastrophic transit failures. | Severe Wet Collapse Moisture dissolves starch adhesive, causing pallet crush. | Retains 85%+ Rigidity Internal AKD sizing resists chilled condensation; 100 kg proof load / 5-high reefer stacking maintained. |
| End-of-Life & Recyclability | Landfill Only Subject to municipal bans and rising EPR plastic penalty taxes. | Non-Recyclable Petroleum wax clogs hydropulpers; rejected by mills. | 100% Curbside Paper Stream Certified PTS-RH 021/97 repulpable in standard blue bins. |
| Chemical & Food Safety | Styrene Monomers Static charge clings to seafood; persistent microplastic sheds. | Paraffin Coatings Petroleum paraffin wax with variable food migration limits. | 100% PFAS-Free FDA 21 CFR §176 compliant for direct contact with fatty proteins. |
RENW Fiber Box
- • Density: 5:1 compact nesting (reclaims 80% warehouse space).
- • Thermal: 48+ hours at 0°C to 4°C in reefer transit with gel packs.
- • Integrity: Retains 85%+ strength in chilled lanes; 100 kg proof load / 5-high reefer stacking.
- • Recovery: 100% blue-bin curbside paper recyclable (PTS-RH 021/97).
- • Safety: 100% PFAS-free and FDA direct food contact compliant.
EPS Foam Coolers
Rigid air blocks consume massive warehouse floor space. Brittle beads fracture in transit, and units are increasingly penalized by municipal plastic bans and Extended Producer Responsibility (EPR) taxes.
Waxed Corrugated Boxes
Prone to wet-down collapse in humid cold rooms, leading to crushed pallet stacks in reefer trailers. Paraffin wax coatings clog paper recycling mills, sending cartons straight to landfills.
Proven in European Seafood Linehaul: Transgourmet Commercial Trials
Transgourmet evaluated the Fiber Box against traditional waxed corrugated boxes and rigid EPS foam coolers across active commercial distribution routes in refrigerated reefer linehaul.
Direct packing line footage: Loading whole fish into bare Fiber Box for reefer transport.
Maintained refrigerated fresh transit window across commercial reefer routes.
Monolithic wet-end sizing maintains structural rigidity in humid refrigerated environments.
Sustained 100 kg proof load without corner collapse in refrigerated trailers.
Replaced non-recyclable waxed corrugate and bulky EPS coolers.
"The point was not a theoretical lab curve. It was surviving actual route vibration, transit moisture, and refrigerated cold chain handling without plastic or wax."
Commercial Linehaul Performance Standard
Request Fiber Box Evaluation Kit
Test physical drop resistance, chilled reefer lane performance, and 80% warehouse floor space recovery directly on your operating packing line.
Your Fiber Box Evaluation Kit Request Is Logged
Your evaluation kit request has been logged. Kits are allocated from regional warehouse buffers for active facility packing line trials. Our technical operations team will send your tracking credentials and evaluation protocol by email.
Direct Engineering Hotline: +1 (844) 620-RENW
Scaled Container Freight & Dedicated Tooling.
For processors and distributors requiring full 40ft ocean containers (3,240 sets per High Cube) or custom thermoform mold geometries, our executive engineering desk coordinates direct factory allocations from primary manufacturing facilities and domestic production lines.
Executive Consultation
Connect directly with our operations and engineering leadership for contract volume modeling and ocean delivery schedules.