18mm Bowl | Hollow

A hollow-stem 18mm glass bowl for larger water pipes and legacy rigs running the 18mm joint standard. The hollow construction reduces weight and opens up airflow for low-drag draws that require minimal lung effort, while the 18mm male joint provides a secure, snug fit in 18mm female downstems. Borosilicate glass handles the thermal cycling of repeated lighter contact without cracking, and the clear glass body lets users monitor bowl contents during a session. A side tab provides a safe, comfortable grip for clearing. The 18mm size is less common than 14mm in newer rigs but remains essential for shops serving customers with older or larger-format water pipes. Stocking 18mm hollow bowls alongside 14mm variants ensures full joint-size coverage across the replacement bowl category.