REUSABLE FOOD GRADE MATERIAL:Made of food-grade PEVA material, reusable storage bags are PVC-free, lead-free, chloride-free and BPA FREE, an eco-friendly and recyclable material. They are not harmful to the environment. Also,you dont need worry about your heath with these food bags. FREEZER SAFE & MULTI-PURPOSE:The bigger food reusable bags are great for marinating meats, meal prep, frozen foods, cereal, cookies, knitting materials, office supplies, they perfect sandwich bags, the smaller food bags are good snack bags, they are the perfect for sandwiches, snacks, lunch, vegetables, fruit, babies food, cosmetics, jewelry make-up, stationery, travel and more. Transparent design can help you recognize the contents inside so quickly. LEAK PROOF & KEEP FOOD FRESH:Storage bags are leak-proof which will meet all your needs. You can store the soup or juice, but remember not to store the hot liquid or hot food. The colorful double closure of reusable sandwich bags enriching your life more interesting and wonderful. Easy to Clean and Use:In order to insure longer life, please clean with hand or bottle brush with soap and warm or cold water and then put it on top of a mug or cup to air dry. They are easy to fold and store to reduce the space required. Perfect for kitchen, picnics and travel. REDUCE PLASTIC WASTE: For the safety of family and the earth, we should use more environment and durable sandwich bags and snack bags rather than using plastic bags. One reusable bags can save up to 350 + disposable bags, not only will change the way you store, cook and even eat.Your little behavior may will save a fish or a turtle.