Most insulated packaging treats sustainability and thermal performance as a trade-off — lighten the environmental footprint, and you usually give something up in R-value. We set out to engineer that trade-off away. Cryophase’s Eco Safe liners are built from 80% recycled kraft paper and paper fibre, fully curbside recyclable, and the thermal modelling for each liner is done using these materials as the baseline rather than retrofitting recycled content into a design built for something else.
Each liner is engineered to a specific carton geometry and a specific shipping duration — overnight or two-day — because insulation sized for the wrong duration either wastes material or under-protects the shipment, and we’d rather solve that with thermal modelling upfront than guesswork. The result is tested to ISTA 20 certification, the industry’s standard for proving a temperature-sensitive package actually performs under realistic transit conditions rather than in a lab best case.
Because the liner conforms to its contents instead of holding a fixed rigid shape, it also collapses the external carton down to the smallest size the product allows — which directly lowers freight cost, since most carriers price on cubic volume. The same conforming material doubles as cushioning, absorbing drops and rough handling that would otherwise damage the contents independent of temperature. Thermally, the liner holds its target range for 24 to 48 hours, which is the engineering margin that turns “probably arrives fresh” into a reliable outcome and meaningfully reduces food waste at scale. And because the fill is recycled paper cellulose rather than wool, it’s odour-free and vegan-friendly — a small detail until it’s the customer’s hands opening the box.