1.4-piece set: This food storage container set includes 4 glass containers with lids of different sizes, with capacities of 12.5oz/370ml, 21oz/630ml, 34oz/1000ml, 63oz/1630ml, to meet your different needs, suitable for kitchen, pantry, meal preparation, packed lunches and leftovers 2. Sealed and fresh: There are 4 glass boxes and 4 sealed lids with silicone sealing rings inside, which can effectively isolate air and dust to ensure the freshness of food, and our kitchen storage containers are also leak-proof to prevent food and liquid leakage 3. Food-grade materials: Our glass storage containers are made of lead borosilicate glass, while the lids are made of BPA-PP plastic. These components ensure the reliability of food storage and are the perfect solution for baking or cooking meat and chicken for lunch. 4. Freezer and microwave safe: The glass lunch box can withstand temperatures from -104℉ to 968℉ (-40℃ to 520℃), and can be frozen and microwaved, but please note that the lid should be removed when microwaved