Hi. We've been a fan of the aeropress for some time along with good friends of ours. We recently visited them and noticed that their plunger had little ridges on it to help stabilize it when pressing it down. My friend purchased his aeropress years before we did. Our aeropress and a new one he purchased (as a spare) have smooth plungers. Is it possible to purchase the plunger with ridges/grooves any where? Thanks! – From Jennifer L.

After a few years we learned that the ridges on the plunger were causing scratches on the inside of the AeroPress chamber. The scratches were not deep enough to affect performance but they were unsightly and the ridges provided no benefit so we eliminated them.