A Buchner Funnel is a laboratory apparatus used for filtration. It consists of a funnel with a flat bottom and a perforated plate, allowing liquid to pass through while retaining solid particles. The funnel is typically made of glass or porcelain and is often used in conjunction with a vacuum source to enhance the filtration process. This device is commonly employed in chemistry and biology labs for separating solids from liquids in various experiments. The use of a vacuum helps to speed up the filtration, making it more efficient than traditional gravity filtration methods.