RENW and PAPACKS have demonstrated that fiber-based packaging can match EPS in real-world seafood cold-chain logistics. In 72-hour trials with TransGourmet Seafood, the Fiber Box maintained structural integrity under 8 kg of fish and direct ice, while keeping internal temperatures below 1°C for over five days.
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For decades, the seafood industry has relied on a single assumption: only plastic foam can survive the cold chain. The high-humidity, 0 to 2°C environment of professional seafood logistics has long been considered the ultimate graveyard for fiber-based packaging.
Last month, we proved that assumption wrong.
At fish international 2026 (Feb 22 to 24 in Bremen, Germany), RENW and our partner PAPACKS unveiled the results of our rigorous cold-chain trials conducted with TransGourmet Seafood in Bremerhaven. We did not test our Fiber Box in a sterile lab; we tested it in real-world, day-to-day logistics operations.
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Fiber Box overview
See the commercial-format system already deployed across lanes.
Specs and technical docs
Review technical references, program specifications, and supporting materials with our engineering team.
Circularity breakdown
See the direct EPS vs waxed corrugated vs fiber recovery reality check.