Crown Metals Pvt. Ltd. Manufactures Aluminium Cans with Bottom Ribs. Crown Metals Pvt. Ltd. Is an ISO 9002 accredited company. The Aluminium Cans with Bottom Ribs are also available for Groove, Groove and Hole. The company also manufactures Capacitor. It is used for Electrolytic A.C. And D.C. Capacitors.