The Stanley 8oz MASTER FLASK is a man-sized hipflask built of cold-rolled steel to make an impactful impression. Its foundry black powdercoat ensures a long-lasting, tool-styled finish. The knurled cap with smooth internal threads provides extra finger grip, quick opens-and-tightens, and a soft feel against your lips. Stanley also tested this flask to ensure its arc has a proper fit in the back pocket of your jeans.