Grav Labs was founded in 2004 in Austin, Texas. Starting with the Gravitron, they have since been an industry trailblazer; offering innovative, high quality, functional, and durable glass pipes, water pipes and accessories. Grav has introduced innovative product lines such as Helix, Upline, Stax, Nano, and an assortment of tasters. At Kannakart, we bring you an extensive selection of Grav Labs glass bongs, hand pipes, bubblers, dab rigs, and accessories. Like Grav, we are committed to providing you with the most beautiful, functional, durable, and affordable glass pipes, bongs, bubblers, and one hitters available.