A bong adapter is an attachment that allows customization of smoking devices and other glass items. They come in a variety of shapes and sizes to fit standardized joint sizes and gender of water pipes. Bong adapters can help solve compatibility issues with different size bowls or nails, and carbon filter adapters can help remove carcinogens and toxins from smoke, providing a healthier smoking experience. Overall, using a bong adapter can enhance the functionality and ease of use of your smoking experience.