1.Warning: Not suitable for dishwashers and microwaves. Do not put it in the dishwasher. The working temperature is -30℃~60℃, suitable for refrigerators and freezers. 6-piece set - two 7L containers and four 2L containers with lids. 6-piece set, 4 medium sizes: 5.6' x 5.6' x 4.6'; 2 large sizes: 12.4' x 6.4' x 5.7'. 2.You can adjust the flow of oxygen and carbon dioxide through the lid with a switch; the switch not only prevents odors from mixing with each other, but can also be used to maintain the storage environment of different foods; help food stay fresher longer. 3.You will get made of durable PET; BPA-food; easy to care- wash with mild soap and water; do not put it in the dishwasher. 4. The 6-piece organizer box keeps items neatly arranged, while the transparent structure allows you to easily see what's inside without opening each box; the raised edges around the lid can keep the boxes in place when stacked; create space-saving vertical storage in closets, shelves and cabinets; maximize your storage space.