This product is made of food-grade silicone which is non-toxic, pollution-free, do not need to be thrown away, each use only after cleaning, can be used repeatedly. These bags are a great way to protect the environment, save money and keep food fresh and healthy. This can be completely sealed, no longer need to worry about leakage, strong airtightness, easy to open. Designed with Airtight seal, leakproof vacuum and zip-locked container to keep food fresh while keeping odors and liquids inside for much longer, which can makes it easy to carry on and go for a camping trip. Orders of 1000 pieces or greater are eligible for sea shipping. 100% guarantee for quality.