← All Partners
In Memoriam

Donald Denzler
“Colly”

Cannabis activist · Inventor · Artist · Legend · Died April 2026

He built a vaporizer because he couldn't buy one. By hand. From clay. In his workshop, chickens in the background, completely himself. The VapBong. His life's work. Award-winning. Irreplaceable.

Colly vaporized cannabis for 48 years. He started at 18 — a friend used a test tube over a bunsen burner. Got him high. He was a bong man after that, for 16 years. Then asthma. Then pain. Then 40 years of engineering a solution, and the VapBong was born.

Ceramic head, hand-thrown. Heating coil inside, rated to 1300°C. Water chamber below, to filter and cool. A breakaway cable connector so if you catch it with your foot, it disconnects before pulling everything off the table. Every piece unique. Every piece a conversation.

He sold them across Europe for 15 years. Then he trusted the wrong people — partners who took his techniques, his measurements, his knowledge, and didn't pay his share. So he went back to making them himself. No website. No web shop. Just an email address under a video, and the work.

“Vaporizing without water is like driving without air in your tyres.”
“Dry vaporizing is like dry sex. It scratches and chafes and it’s unpleasant.”
“This is the best thing I’ve ever invented.”

His protégé Dean (Traverse Dean) shared his video with Chris after Colly died. “He was a legend without knowing that he is one and I want to give him the honour he earns.” That video became the Colly memorial on Cannabin-Oid. This page is the Basecamp chapter of the same story.

He is here in Berlin in spirit. Wherever vaporizers gather, Colly is there.

“Stay high.”
Full name
Donald Denzler
Known as
Colly · Dr. Colli
Location in life
Gran Canaria, Spain — chickens, bucket garden, hemp, moringa
Invention
The VapBong — ceramic, hand-thrown, water-cooled, award-winning
Visit the Colly Memorial → Watch Colly in his workshop (YouTube) →