Polythene Sealer Multifunctional Food Vacuum Sealer... Electronic Impulse Thermal Plastic Polythene Sealer Multifunctional Food Vacuum Sealer. Multifunctional Food Vacuum Sealer】: The automatic vacuum sealer can keep the freshness of fruits, nuts, meat, sweets, and vegetables, preventing foods from getting freezer burned, molded, and spoiled, reduces spoilage and food waste.