Material:The container is made of plant fiber. It features a secure clamshell seal to keep the contents fresh. Easy to open and close for improved utility. Dimensions: The internal dimensions are 4" long x 4" wide x 2-7/8" deep. They are perfect containers for sandwiches, biscuits, chocolate bark, cinnamon rolls, brownies and cakes. Practical: The hinge design is cleverly used, which is easy to open, and the lock lever function can provide a tight seal, so the food will not slip out or overflow. In addition, they can be stacked nicely, saving you much-needed space. Refrigerator microwave safe: this paper food container can be refrigerated to -4 degrees F and heated to 248 degrees F. Use it to keep food fresh, heat your lunch and more! This clamshell packaging is ideal for sandwiches, burgers, cake and pie slices, salads, fries, and many others. Perfect for serving and storing foods for Camping, Picnics, Lunches, Catering, BBQs, Events, Parties, Weddings and Restaurants.