A bottle capper is a device used to seal bottles with caps, ensuring that the contents remain fresh and protected from contamination. It is commonly used in the beverage industry for products like beer, soda, and juice. The capper applies pressure to secure the cap onto the bottle, creating an airtight seal. There are various types of bottle cappers, including manual and automatic models. Manual cappers require physical effort to operate, while automatic cappers streamline the process for high-volume production. Both types are essential for home brewers and commercial bottling operations, contributing to the overall quality and safety of bottled beverages.