Limited edition copper vacuum insulated flask is one of our Adela series water bottles. It has a double wall insulated stainless steel interiors that locks in beverage temperature to preserve flavor and freshness, and eleminates smell from sticking. It regulates drink temperature longer than normal flask at u to 24hrs. The threaded stainless steel lid is designed for easy drinking, filling or pouring. It's copper finish makes it a great choice for gifting or as a party favor for any corporate events.