Deep Dive
Why a vertical glass tube extracts coffee differently — and better — than any traditional cone dripper.
Traditional cone drippers — whether V60, Chemex, or flat-bottom — share a fundamental limitation: water passes through the coffee bed in a wide, shallow path. The contact time between water and grounds is brief, and the extraction is often uneven. Water finds the path of least resistance, channeling through some areas while barely touching others.
The result is a cup that’s often bright and clean, but lacks the full-bodied complexity that the beans are capable of delivering.
Our tube design fundamentally changes the extraction geometry. Instead of a wide, shallow bed, coffee grounds are stacked vertically in a narrow column. Water must pass through the entire length of this column — maintaining contact with every granule for significantly longer than any cone design allows.
The result is a more complete extraction: more sweetness, more body, more complexity — without the bitterness that comes from over-extraction. The vertical path ensures even saturation throughout the entire coffee bed.
Traditional Cone
contact time
Proper Coffee Tube
contact time
The brew tip at the base of the tube acts as a precision valve. By swapping between five different hole diameters — from 1/8 inch to 3/4 inch — you control exactly how fast water exits the tube.
A smaller hole creates a longer steep time, extracting more body and sweetness from the grounds. A larger hole allows a faster flow, producing a brighter, cleaner cup. This level of control simply isn’t possible with a cone dripper, where flow rate is determined entirely by grind size and filter porosity.
In a cone, the wide bed means some grounds are constantly exposed to air while others are fully submerged. This uneven saturation leads to inconsistent extraction — some compounds are fully developed while others barely dissolve.
In our tube, the narrow column ensures complete, uniform saturation. Every granule is equally immersed in water for the full duration of the brew. The filter (mesh or paper) sits at the bottom of this column, meaning extracted liquid must pass through the entire bed before exiting — maximizing contact and flavor development.
We use borosilicate glass for our tubes — the same material used in laboratory equipment. It’s chemically inert (it won’t impart any flavor), thermally resistant (it won’t crack from boiling water), and optically clear (you can watch the entire extraction process unfold).
The aluminum frames and brew tips are CNC-machined from solid billet stock — not cast or stamped. This ensures dimensional precision that’s critical for consistent flow control across every brewer we make.