Proto Pipe inventor Phil Jergenson, left, holds a Proto Rocket. His brother Richard Jergenson, the company archivist and a cannabis historian, holds a classic version of the pipe at the Emerald City Cannabis Museum pop-up in Willits, California.

Proto Pipe inventor Phil Jergenson, left, holds a Proto Rocket. His brother Richard Jergenson, the company archivist and a cannabis historian, holds a classic version of the pipe at the Emerald City Cannabis Museum pop-up in Willits, California.