FDA & SGS APPROVED FOOD GRADE SILICONE –This set includes 4 Medium silicone food storage bags (capacity: 4 cups/1 Liter/ 30oz; size: 9" X7") + 6 Silicone Stretch Lids that can fulfill all kitchen needs. Our food bags Made of food grade silicone and does not contain any fillers, coating, BPA, BPS, BPF or PVC LEAKPROOF - Designed with Airtight seal, leakproof vacuum and zip-locked container,perfect for storing food and liquid, portable and save room. HEAT & COLD RESISTANT - When using preservation heating, ensure food is heated evenly, heat resistance up to 482°F (250°C), cold temperature can reach -58°F (-50°C). Safely use in the dishwasher, freezer, microwave, oven or boiling water. FRIENDLY FOR ENVIRONMENT - Reduce the amount of plastic in your trash with these amazing reusable silicone food storage bags. Plus, these reusable silicone food storage bags save money with each use. You can simply wash and re-use them day in and day out. VERSATILE AND PRACTICAL - Each bag can be sealed and re-zipped with a handle that slides off horizontally. The back side of each bag has measuring scale to help track the volume added into the bag. These bags can store hot or cold liquid or food. Their slim, flexible design reduces the amount of storage space used in your fridge or freezer. They can easily fit in a backpack or bag for lunch at the office or cafeteria. These snack bags also lay flat when empty.