[Extending freshness 5 - 8 times] excellent vacuum effects and close seams can reduce freshness 5 - 8 times. It has the functions of hydration, mold, insects, bacteriostasis and antioxidation. Natural, without preservatives. The best option for the cake. [Professional vacuum bag] The professional film Lixin can be reused (the dishwasher is safe), it can be cooked and is suitable for microwave. The lysine vacuum film is also ideal for cooking in a vacuum. Vaccaded vacuum bags with print maximize freshness and achieve effective air extraction to better conserve food. Our vacuum bags can multiply the freshness of food by eight.