Bottle holders are accessories designed to securely hold bottles, making them easier to carry and access. They come in various styles, including those for water bottles, wine bottles, and baby bottles. Common materials used for bottle holders include fabric, plastic, and metal, often featuring straps or handles for convenience. These holders are popular for outdoor activities like hiking, picnics, and sports events. They help prevent spills and keep drinks at the desired temperature. Some bottle holders are insulated, providing thermal protection, while others may have additional features like pockets for storing small items, enhancing their functionality during use.