The containers are made with the rotational molding technology, so as to have a single polyethylene hollow body, without joints, suitable for contact with food.
The polyurethane foam is injected into the cavity in order to guarantee thermal insulation.
The type of construction allows to have an extremely solid container, but not rigid (unlike containers made of assembled glass fiber panels), capable of withstanding for years the vibrations related to the use on vehicles, even on difficult roads.