# Does your coffee brewer's shape actually change the flavour?

> Cone-shaped and flat-bottom pour-overs produce genuinely different cups, and it comes down to how water moves through the grounds.

By Joey Krosch. Published 2024-09-19, updated 2026-08-17.

The V60-versus-Kalita-Wave debate isn't just brand preference. Cone-shaped
and flat-bottom brewers genuinely produce different cups, and the reason
comes down to something simple: the shape of the vessel changes how water
moves through the coffee bed.

## Why shape matters

A cone-shaped brewer creates a funnel effect: water accelerates as it
narrows toward the exit point at the bottom, which means contact time
varies across the bed depending on where the water currently is in its
path. A flat-bottom brewer, with several small exit holes spread evenly
across the base, gives water a more consistent, even path through the
grounds, without that same acceleration effect.

> **What this means for your cup:**
> Neither shape is objectively better, they tend to produce genuinely
> different results, and which one you want depends on what you're after
> from a given coffee.

## What each shape tends to produce

**Flat-bottom brewers** (Kalita Wave and similar) tend to produce
sweeter, fuller-bodied coffee with more of the darker fruit and chocolate
notes coming through, a result of that more even, consistent extraction.

**Conical brewers** (V60 and similar) tend to favour bright acidity and
citrus clarity, sometimes at the cost of a little body, since the varying
contact time across the bed changes which compounds come through most.

**Cylindrical designs** sit somewhere between the two, generally aiming
for balanced extraction without leaning hard toward either brighter
acidity or fuller body.

## Adjusting your technique to the shape

For a **conical brewer**, pulse pouring, small pours spaced roughly 30 to
45 seconds apart in a centre-to-spiral pattern, helps manage that
funnelling effect and keeps extraction more even than one continuous
pour would.

For a **flat-bottom brewer**, either continuous or pulse pouring works
reasonably well, since the shape is already doing more of the evening-out
work on its own. Keep pour height in the 4 to 7 centimetre range and a
steady flow rate, roughly 4 to 6 grams per second, for consistent results
either way.

## The takeaway

If your coffee consistently tastes brighter or more acidic than you'd
like, or the reverse, heavier and less lively than expected, the shape of
your brewer is a genuinely worthwhile thing to experiment with, not just a
design choice. Trying the same beans through both a cone and a flat-bottom
brewer side by side is the fastest way to actually taste the difference
for yourself.