Is hydro flask a tool or machine?

A Hydro Flask is neither a tool nor a machine; it is a type of insulated water bottle designed to keep beverages hot or cold for extended periods. It is made from stainless steel and features a vacuum-sealed design, making it effective for maintaining temperature. While it serves a functional purpose, it does not fit the definitions of a tool (which typically aids in performing a task) or a machine (which usually involves mechanical parts for operation).