A piston filler is a type of liquid filling machine commonly used in the packaging industry. It operates by using a piston to draw liquid into a chamber and then dispense it into containers, such as bottles or jars. This method is efficient for filling products with varying viscosities, from thin liquids to thicker substances like sauces or creams. Piston fillers are often found in industries like food and beverage, pharmaceuticals, and cosmetics. They can be adjusted for different fill volumes and are known for their accuracy and speed. This makes them a popular choice for manufacturers looking to streamline their production processes.