... . Maintain long-time low temperature. 3. Non-toxic, non-caustic, no off flavour and side ice box1. Reusable for cold use. 2. ... Maintain long-time low temperature. 3. Non-toxic, non-caustic, no off ... life: Electricity-saving, keeping cold when out of electricity, keeping the foods fresh, iced drink, traveling etc. cooling box made of PP material