Food safety experts warn against improper plastic container use

Experts are warning against improper use of plastic and styrofoam containers, which can lead to the migration of chemical additives into food.

In the Czech Republic, Lukáš Vápenka from the Institute of Food Preservation at VŠCHT Prague notes that repurposing containers—such as using ice cream tubs for hot meals—poses risks. While food-grade plastics undergo migration testing, using them outside their intended temperature or purpose can cause additives like stabilizers to leach into food. This risk is particularly high with fatty foods, as fats can cause certain plastics to swell and interact more intensely with the container surface.

In Vietnam, health warnings highlight that polystyrene (PS) styrofoam containers should not be used for food exceeding 70°C, as high temperatures can cause deformation and chemical leaching. Common mistakes include placing steaming hot food directly into plastic, using non-microwave-safe containers in the microwave, and storing oily foods in improper plastics. Experts recommend using heat-resistant materials like glass for hot or fatty foods to ensure safety.