A reusable cup is a durable drinking vessel designed to be used multiple times, reducing the need for single-use cups. Made from materials like stainless steel, glass, or BPA-free plastic, these cups are often insulated to keep beverages hot or cold. They are popular for coffee, tea, and other drinks, promoting sustainability by minimizing waste. Many cafes and restaurants encourage the use of reusable cups by offering discounts to customers who bring their own. This practice supports environmental efforts and helps reduce the amount of plastic waste that ends up in landfills and oceans, contributing to a cleaner planet.