1.AIR TIGHT and LEAK-RESISTANT: Stretch and Fresh is the amazing, food storage container that uses food-grade silicone-lined lids to shut in moisture and elimite air oxidation, sealing in freshness and allowing for food to last longer than the traditiol plastic cling-wrap and other standard food storage containers. What's more, the Stretch and Fresh also resists leaking. Store soup, or sauces for later uses without completely messing up your refrigerator with spills and leaks! 2.FREEZER, MICROWAVE and DISHWASHER-SAFE: Stretch and Fresh helps prevent food from getting zer burns. Now you can prepare meals, store them in the zer for later consumption, take them out when you need them, heat it in the microwave, and stick the Stretch and Fresh in the Dishwasher after. 1 container from start to finish!. 3.STACKABLE for Easy Storage: Are you familiar with missing lids, or mismatched container piecesUnlike most food storage systems out there, the Stretch and Fresh fits inside another when not in use, saving you precious space to help keep your kitchen organized! 4.INCLUDED parts and sizes: Rectangle-XL 8.25 inchx 5.5 inchx3.25; Rectangle-Large 7 inchx4.7 inchx2.75 inch; Rectangle-Medium 6 inchx4 inchx2.25 inch; Rectangle-Small 4.5 inchx3.2 inchx1.25 inch; Square-Large 5.75 inchx5.75 inchx2.5 inch; Square-Small 4.7 inchx4.7 inchx2 inch 5.BPA-FREE: Prepare and enjoy y meals with our BPA- food storage containers, and keep them fresh using the Fresh and Stretch knowing that they will last longer.