A 5" Gilcilin water pipe is a type of smoking device used primarily for the consumption of tobacco or legal smoking herbs. Here's a brief description:

1. Size: The water pipe measures 5 inches in height, making it a compact and portable smoking device.

2. Brand: "Gilcilin" may refer to the manufacturer or brand of the water pipe, and it's often associated with quality and craftsmanship.

3. Water Filtration: Water pipes, also known as bongs, use water to filter and cool the smoke before it's inhaled. They typically consist of a water chamber, a bowl for the smoking material, a downstem that extends into the water, and a mouthpiece. The water helps provide a smoother and cooler smoking experience.

4. Materials: Water pipes can be made from various materials, but they often use heat-resistant borosilicate glass, which preserves the flavor of the smoked material and is easy to clean.

5. Function: To use the water pipe, users fill the water chamber with water, place the smoking material in the bowl, apply heat to the material with a flame, and then inhale through the mouthpiece. The smoke is filtered through the water, providing a smoother and less harsh smoking experience.

6. Legal Use: The use of water pipes for tobacco or legal smoking herbs is typically legal but may be subject to age restrictions and local regulations. Always be aware of and follow your local laws when using smoking devices like the 5" Gilcilin water pipe.

This specific water pipe is relatively small and may be preferred for its portability and ease of use, especially for those who enjoy smoking on the go.