Coasters are small, flat objects designed to protect surfaces from moisture and heat damage caused by beverages. They are commonly made from materials like cork, wood, plastic, or ceramic. Coasters come in various shapes, sizes, and designs, making them both functional and decorative for homes, restaurants, and bars. In addition to their practical use, coasters can also serve as promotional items for businesses. Many companies print their logos or advertisements on coasters to increase brand visibility. Some people even collect unique or artistic coasters as a hobby, showcasing them in their homes or using them during gatherings.