Those who are not familiar with the Upline by Grav Labs are in for a surprise. The smoke cools as it pass through the Upline spines. This unique design was pioneered and designed by the award winning Micah Evans. Made from 16x2.5mm glass, this baby was built to last. The unique pinched mouthpiece catches ash for clean hits. Compact and discreet, this is the perfect go anywhere pipe!