GRAV® 10mm 45° Hourglass Quartz Banger aline space shuttle bong Why is borosilicate glass used

Why is borosilicate glass used for scientific bongs

Smoke flower or concentrate out of this portable little piece

The BFF Pipe Set features two connected pipes designed to be shared

This biodegradable formula ensures optimum results in optimal time

The perfect balance of art and craftsmanship

GRAV® 10mm 45° Hourglass Quartz Banger aline space shuttle bong Why is borosilicate glass usedGRAV Hourglass Banger The GRAV Hourglass Banger features a distinct hourglass silhouette designed to function well for people who prefer cold start dabs. The inward curvature combined with two directional air intakes creates a whirling tornado effect, keeping inserts like pearls and pillars in constant motion within the bottom portion. This design maximizes surface area and heat retention, ensuring optimal vapor release and minimizing waste. Specs: