Features:1. The food could be made from high-density PET and PE, and the healthful material has no abnormal odor 2. Strong toughness, demanding to break 3. The seven-layer extrusion process, without adhesive, blocks the outside air, water and bacteria, and locks within the inside fresh diet 4. It is relevant to every variety of vacuum machines with out picking machines 5 ° can nevertheless be frozen and fresh, extending the shelf life of meals