This glass lunch box is sold in a 10-piece set, including 10 containers and 10 lids. Each box has a capacity of 30 oz. It is suitable for meal preparation, leftover storage, snack storage, and can also be used for fitness, office lunches, travel, and picnics. The lunch box is made of high-quality borosilicate glass, which is durable and can be directly placed in the refrigerator, microwave oven or oven. It does not absorb stains or odors, is easy to clean and can be reused. The product can be used in microwave ovens, refrigerators, dishwashers and ovens. Before use, the plastic lid should be removed. It comes with a snap-on lid with a silicone sealing ring, which is leak-proof and keeps food fresh well. It is easy to open and close and is not prone to damage. The 30 oz. capacity makes it convenient for portioning food and helps control the portion size.