Hario Mugen is a rib-less v60 coffee brewer. It has a relatively smooth wall to minimize water bypass. The idea is to create a one-pour coffee brewer.
I think it works great most of the time. Perfect when you just want to make a simple cup of coffee.
My issue with it is that sometimes placing the paper filter can be a little tricky. If you don’t place it right, the paper filter won’t adhere nicely to the wall.
Continue reading 3D printed v60 paper filter folding tool (negotiator) for Hario Mugen