The Orea Z1 is the most experimental member of the Orea line, an open-bottomed dripper that sits somewhere between a percolator and a bare brew basket. There is almost nothing restricting flow — water passes through the coffee bed and drops straight into the server below, with the filter providing the only real barrier.
The point of the Z1 is to let the coffee itself, not the dripper, dictate extraction. Grind finer than you would on any other flat bed, use more pours rather than fewer, and expect an active, involved brewing process. In competition settings the Z1 has been used to pull unusually textured cups where the brewer exploits the lack of restriction to move heat and agitation through the bed with precision.
A starting recipe: 14 g of coffee to 220 g of water (1:16), a grind notably finer than a V60 setting, water at 92 °C, five or six pours in 2:30 to 3:15. This is not the Orea for daily brewing — the V3 or V4 Narrow fill that role far better — but it is the one to reach for when you want to treat pour-over as a performance rather than a routine.