A whipping siphon is a kitchen tool used to create whipped cream and other foams. It consists of a stainless steel container with a lid, a nozzle, and a charger holder that uses nitrous oxide gas to whip the cream. When the gas is released into the container, it creates pressure that forces the cream through the nozzle, resulting in a light and airy texture. Whipping siphons can also be used for infusing flavors into liquids or creating mousses and sauces. They are popular among chefs and home cooks for their versatility and ability to produce consistent results quickly.