A hot tub is a large tub filled with heated water, designed for relaxation and hydrotherapy. Typically made from materials like acrylic or wood, hot tubs can accommodate several people and often feature jets that provide massage-like experiences. They are commonly used in backyards, spas, and resorts. Hot tubs can be powered by electricity or gas and may include additional features such as lighting, sound systems, and water purification systems. Regular maintenance is essential to keep the water clean and safe for users. Many people enjoy using hot tubs for stress relief, socializing, or soothing sore muscles.