A reusable bottle is a container designed to hold liquids, typically made from materials like stainless steel, glass, or BPA-free plastic. These bottles can be filled multiple times, reducing the need for single-use plastic bottles and helping to minimize environmental waste. They often come with features like insulation to keep drinks hot or cold and are available in various sizes and designs. Using a reusable bottle promotes sustainability and encourages hydration. Many people carry them to work, school, or during outdoor activities. Some brands, like Hydro Flask and Nalgene, offer customizable options, making it easy for individuals to express their personal style while being eco-friendly.