An American icon, the Model One Flask is the world’s original copper flask, crafted in the same timeless fashion since 1819. Its 22-gauge solid copper body, finished with ultra-reflective SuperPolish™, feels substantial and impeccably built, while the interior is lined with molten, lead-free tin using a trade-secret lost process. Classically styled with historical flair, it comes with both the original wood stopper and a modern cork stopper for an airtight seal.