500 ml butter round glass jar is having 82 mm lug cap on same, over flow capacity of glass jar is 520ml, suitable for ghee, honey, jam and pickle packing, round glass jar is suitable for all food grade products, 520 ml glass jar is also used for 500 ml ghee packing, metal cap on the same makes this bottle air tight and leak proof, we also have 1000 ml Glass Jar in same design.