Top positive review
No different than my original Osterizer base
on October 24, 2013
This jar base (officially called a "jar bottom cap" by Oster) is no different than my original base that looks like Bakelite.
My original base was expanding/swelling because I put it in the dishwasher. I had to push it down harder and harder on the blender in order to make it work (because the drive shaft didn't reach the bottom of the blade). Eventually, the jar base would have cracked because of pressure. I sanded down the ribs on the original base, in order to make it fit again, and now I have the original base working again. I was surprised how much I had to sand down the ribs, though. I had to put the sandpaper flat on the counter and move the plastic base back and forth, otherwise I got rounded edges.