TRIED AND TRUE Classic Kidney pays tribute to one of our original shapes and styles: the iconic kidney flask. Featuring the perfect curved design, Classic Kidney is an heirloom-quality kidney flask produced by Jacob Bromwell® for over 200 years—and it's still a prized favorite. This handsome flask is individually hand molded to fit comfortably in your front or back pocket, with a weight and solid feel that reminds you of its genuine, old world quality. Its body is made of 22 gauge solid copper—finished off with our ultra-reflective SuperPolish™ finish—while molten, lead-free tin is applied to the interior using a lost process that's trade-secret to our company. The timeless kidney shape makes it the perfect flask for everyday carry, while the phenomenal build quality means it can withstand a lifetime of use. Made with devotion, skill, and the utmost attention to detail, give your Classic Kidney the story it deserves. Enjoy the elevated social status, and cherish your flask for life—then pass it down to the next generation. USNA 1977: Classic Kidney is a special edition, official Jacob Bromwell® flask not available to the general public. Engraving will not be colored black on final production and will be engraved directly into copper, rendering it colorless. Imperfectly Perfect: Minor imperfections lend charm, depth, and individuality to each piece and are a natural part of the 100% handmade process. Embrace the imperfect. This is the Jacob Bromwell® way.