Glass water pipes, also known as bongs, are smoking device that uses water to cool and filter smoke before inhaling it. They are typically made of glass, although other materials such as silicone, ceramic, or acrylic may also be used.

The basic design of a glass water pipe consists of a bowl for holding the smoking material, a downstem that extends into the water, and a chamber that holds the water. When the user inhales through the mouthpiece, smoke is drawn through the water, which cools and filters the smoke before it is inhaled. This process can help to reduce the harshness and irritation associated with smoking. Glass water pipes come in a variety of shapes and sizes, from simple and practical to highly ornate and artistic. Some may include additional features such as percolators or diffusers, which further filter and cool the smoke. Glass water pipes can also be customized with various accessories, such as ash catchers or adapters, to enhance the smoking experience.

One advantage of glass water pipes is their durability and longevity, as high-quality glass can withstand frequent use and cleaning without cracking or breaking. Glass water pipes are also relatively easy to clean, as they can be disassembled and soaked in a cleaning solution to remove any residue or buildup. However, glass water pipes can be expensive, especially for larger or more intricate designs. They may also be more fragile than other smoking devices and require careful handling and storage to prevent damage or breakage.