Seal n' Vac 9 pc. Square Containers Set Includes 1.9 Cup, 3.8 Cup, 6.96 cup, 11.84 Cup and Pump Easy to use vacuum pump maximizes air removal - so food stays fresher longer Heavy Duty Containers - Strong enough for freezer, refrigerator, dishwasher and microwave (with lid removed) use Container is made from BPA Free polypropylene; Safe for microwave (with lid off), dishwasher, freezer, refrigerator and pantry Leak resistant Lids with heavy duty snap down hinges keep contents safe without spillage Heavy Duty Valve and Gaskets - Holds the vacuum and removes for easy cleaning