A more thorough explanation:

Head Shop

A head shop is a store that sells products that are intended for use with illegal drugs.

• Rolling papers
• Pipes
• Bongs
• Vaporizers

These items are commonly used to smoke or ingest illegal drugs such as marijuana, cocaine, and methamphetamine.

Head shops may also sell items that are legal, such as tobacco products and herbal supplements, but their main focus is on products that are associated with drug use.