GRAV | Gravitron® | Medium Gravity Bong | 9"
Product Details
The GRAV Medium Gravitron® is a full-glass gravity bong and one of the best-selling smoke accessories on the market — a compact, closed-system piece that uses gravity and water pressure to deliver dense, efficient hits with zero smoke waste.
Originally invented in 2004, the Gravitron has been refined into a premium borosilicate piece that elevates the classic gravity bong from DIY novelty to a clean, classy ritual. Perfect for personal sessions or sharing with a small group.
About the GRAV Medium Gravitron®
The Medium Gravitron® stands approximately 9 inches tall and is built from heavy-duty 5mm borosilicate glass — both the bottle and the base. A platinum-cured silicone grommet at the bottom of the inner bottle protects the glass-on-glass contact point and ensures an airtight seal for maximum smoke density.
Joint size: 14mm female — compatible with any standard 14mm male bowl.
Includes: Medium Gravitron® bottle, Medium Gravitron® base, and a 14mm Funnel Bowl.
Height: ~9 inches | Base diameter: ~3 inches | Glass thickness: 5mm borosilicate
Key features: Closed system keeps smoke fully contained until you're ready to inhale — no waste, no lost hits. Straight-sided design makes it quick and easy to clean. Flange at the top of the neck provides a confident grip when lifting.
How to Smoke It
Fill the base about halfway with water. Pack the 14mm Funnel Bowl with your preferred dry herb and seat it into the neck joint of the bottle. Light the bowl while simultaneously lifting the inner bottle upward — do not lift it fully out of the water or you'll release the smoke. Once the bottle is full of milky smoke, remove the bowl, place your mouth over the neck opening, and inhale as you gently lower the bottle back down. Gravity does the work and delivers a pressurized, full hit every time.
Start slow if you're new to gravity bongs — hits are significantly denser than a standard pipe or bong. Wait between sessions to gauge your tolerance. Store the piece clean and dry to preserve clarity and hygiene.
Compliance & Sourcing
The GRAV Medium Gravitron® is a glass smoking accessory sold for use with legal dry herbs. GRAV has manufactured borosilicate glass smoking products since 2004 and sources only premium scientific-grade glass. No cannabinoids, chemicals, or controlled substances are contained in this product.
Adults 21+ only. Do not drive, operate machinery, or consume with alcohol after using this product.
Delivery & Shipping
Same-day delivery on the GRAV Medium Gravitron® in Austin and Lubbock — typically within two hours. Nationwide shipping in 2-3 business days to most U.S. states (excluded: AK, MN, ID, OR, RI, VA). Live support 11am–11pm CST daily at (512) 337-3988.