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Glass Blunt





Founded in Austin, Texas in 2004, GRAV designs and manufactures high quality, scientific glassware. They specialize in stylish, functional and affordable, laboratory-grade glass and have created lasting brands like Helix, Stax, and Upline.


Much of GRAV’s success has been driven by collaboration and the company takes pride in the ability to collaborate with some of the best glassblowers in the world, taking their designs to a larger community.


GRAV are perhaps best known for their range of Helix Glass products, which feature minuscule, angular Tungsten holes poked into the sides of the upper tube. This feature utilizes Swiss mathematician and physicist Daniel Bernoulli’s principle of airflow, first published in 1738 in his book Hydrodynamica.


It states that an increase in the speed of a fluid occurs simultaneously with a decrease in the pressure exerted by the fluid. This means that a rise in pressure in a flowing fluid must always be accompanied by a decrease in the speed, and vice-versa.


When applied to their glass products, the Tungsten holes produce something called the Venturi Effect, which is the reduction in fluid pressure that results when a fluid flows through a constricted section of piping. This process contributes greatly to the cooling and slowing-down of the airflow.

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