Sub-Zero Spark 14mm Freezable Glycerin Glass BowlElevate your session to the arctic circle with the Sub Zero Spark, a premium 14mm glass bowl engineered for the ultimate "chill" factor. Designed for connoisseurs who crave the smoothness of a high end water pipe without the mess of melting ice, this bowl turns every hit into a crisp, refreshing breeze. Why Its a Game Changer The secret lies in the high viscosity liquid glycerin sealed within the double walled borosilicate glass. Unlike water,