1.Oil-resistant and durable: these boxes are equipped with a polyester-coated interior to prevent the penetration of grease. 2.Convenient label lock closure: just fold the box's sturdy clamshell lid and secure its built-in label lock closure to reduce the risk of spillage, leakage and confusion. 3.Right size: This round container measures 3.2" x 2.9" x 4" and has a capacity of up to 16 ounces. 4.Recyclable and nature-friendly: These black containers are made of ecologically sustainable paper and are an excellent alternative to hazardous styrofoam or plastic containers. Rinse and recycle after use!