Tea bags are small, porous pouches filled with dried tea leaves. They are designed for steeping in hot water, allowing the flavors and nutrients of the tea to infuse into the liquid. Tea bags come in various shapes, such as rectangular or round, and are often made from paper, silk, or nylon. The convenience of tea bags makes them popular for quick brewing. Users can easily dispose of the bag after use, eliminating the need for loose tea leaves and additional equipment like strainers. This method is widely used for different types of tea, including black tea, green tea, and herbal tea.