A hinged filter is a special type of filter that is integrated into the lid or wall of the kettle and can be hinged for easy cleaning and maintenance. These filters can be made from a variety of materials, such as stainless steel or plastic, and offer users a convenient way to keep the filter clean and functional. Tilt-in filters combine the benefits of permanent and exempt filters by being easily accessible for cleaning, but do not require regular replacement. However, they may be less robust than fixed filters and may require more careful handling for cleaning.