Called Nutshell, the cooler is made using coconut husk as insulation, reducing the need for petroleum-based materials.

The husk of a coconut it protects the water inside, keeping it cool in the heat and safe when it falls. However, the shells are waste for the farmers, and billions of husks are burned every year, generating tons of CO2 emissions. Nutshel buys husks from small-scale farmers in the Philippines, providing them with extra income for food, school fees, and community investment.

Coconut husk fibres are hollow and contain tons of tiny trapped air pockets, a similar structure to plastic foam insulation. Using these fibres, Nutshell developed a foldable cooler that claims to be able to keep things cool for 48 hours.

Photos: Nutshell