The 14" Gravitron Water Pipe still as much fun and as hard-hitting as it was back in 2004 when it was invented. There's a reason the world's first all-glass gravity smoking system is still popular and iconic to this day, and that's that it does the job of delivering big, pressurized hits extremely well. How it Works. When you're ready to hit it, remove the bowl and inhale through the mouthpiece of the bottle as you push it back down into the water. This will create a pressurized flow of smoke that will give you a huge hit in record time. What's in the Box. 1x - Grav Labs 14" Gravitron Water Pipe Version 2.0 - Clear