Manhattan Flask 5 OZ (Qty 1) Manhattan Flask 5 OZ (Qty 1) This stylish round flask says "class" from its simple yet chic design to the elegant center monogram. Fashioned from highly polished stainless steel with an easy-to-open screw-on cap, our Manhattan flask fits easily in a pocket or briefcase. Holds 5 oz. and is personalized with one letter Email us with your information once you have placed your order. Failure to do this will slow down the process of your order.