# Glass vs Metal vs Wood Pipe Chart

> **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637)
> **Publisher:** CED Clinic (https://cedclinic.com)
> **Canonical URL:** https://cedclinic.com/d11-impact-of-inhalation-device-material-on-quality-of-inhaled-cannabis-png/
> **Published:** 2026-09-04T23:05:07-04:00 | **Last Modified / Clinically Audited:** 2026-09-13T14:38:42-04:00
> **Clinical Summary:** How glass, metal, and wood inhalation devices change the quality of inhaled cannabis, from vapor purity and taste to heat and safety.

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[← Back to the Technical Info Summary Hub](https://cedclinic.com/topic-technical-info/)Diagram & referenceA visual reference. The evidence, sources and clinical interpretation are in the linked article.About this diagramThree parallel two box columns, one each for a glass, a metal, and a wood device. Each column drops from the device to its stated result, labeled high, medium, or low quality smoke or vapor, and ends at optimal, moderate, or less intense cannabis effects. Read it column by column rather than across. The graphic ranks the three materials against one another and shows no measurements behind the ranking.The evidence behind it[Read the evidence: which device materials actually reach the aerosol, and which comparisons are untested](https://cedclinic.com/cannabis-vape-device-materials-vapor-quality/)That article carries the cited studies, the limits of the evidence, and the clinical interpretation.

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### Verification & Medical Governance

- **Lead Clinical Author:** Benjamin Caplan, MD
- **Credentials:** Board Certified in Family Medicine (ABFM), Former CMO Canna Care Docs (250,000+ patients supervised), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House).
- **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`).
- **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/).
- **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637).
- **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).