A glass pipe bong, often referred to simply as a "bong," is a type of water pipe used for smoking various substances, most commonly cannabis. It is a popular choice among smokers due to its ability to filter and cool the smoke, resulting in a smoother and more enjoyable smoking experience. Here is a description of the typical features and components of a glass pipe bong:

1. Bowl: This is the part where the substance to be smoked is placed. It is typically a removable piece that fits into the downstem. Users fill the bowl with their preferred smoking material, usually dried herbs or tobacco.

2. Downstem: The downstem is a long, slender tube that connects the bowl to the main chamber of the bong. It serves as a pathway for the smoke to travel from the bowl into the water.

3. Water Chamber: The main body of the bong is a chamber that is partially filled with water. The downstem typically extends into the water, and as the user inhales, smoke is pulled through the water. This process helps cool and filter the smoke, making it less harsh on the throat and lungs.

4. Carb Hole: Some bongs have a small hole, known as a "carb" or "carburetor," usually located on the side or back of the chamber. Covering and releasing the carb while inhaling allows the user to control the airflow and clear the chamber of smoke when desired.

5. Mouthpiece: At the top of the bong, there is a mouthpiece where the user places their lips to inhale the smoke.

6. Percolator: Some bongs feature additional components called percolators, which are designed to further filter and diffuse the smoke, providing a smoother hit. Percolators come in various styles, such as tree, honeycomb, or showerhead percs.

7. Base: The base of the bong provides stability and support for the entire structure. It prevents the bong from easily tipping over.

8. Material: Glass is the most common material used for bongs due to its smooth, clean taste and aesthetic appeal. However, bongs can also be made from acrylic, silicone, ceramic, and other materials.

9. Size and Shape: Bongs come in various sizes and shapes. Some are compact and portable, while others are larger and more elaborate with multiple chambers and percolators. The choice of size and shape often depends on personal preference and intended use.

10. Design and Aesthetics: Many bongs are adorned with artistic designs, colors, or unique features, making them not only functional but also visually appealing.

11. Cleaning Tools: To maintain the bong's functionality and cleanliness, users often employ cleaning tools such as brushes, pipe cleaners, and cleaning solutions to remove residue and build-up.

It's important to note that the use of glass pipe bongs for smoking substances may be subject to legal restrictions and regulations in different jurisdictions. Additionally, always use bongs responsibly and in accordance with local laws.