Blender Buying - Square vs. Round Container After looking at this blender question, I had a follow-up question.

I've seen both square and round containers/lids for blenders. Is either better?

I tend to see square blenders at smoothie shops - leading me to assume square ones are better.  By better I mean, you don't have to do as much scraping and maybe they have more settings and automated features. I see mostly round blenders in your typical kitchen appliance aisle at your typical big box store.
I can think of two reasons to prefer square containers :


They store in less space for the same volume, when you're dealing with dozens of them (as the smoothie shops likely are)
The key to a good blending is that the inside is not round -- you need baffles and such to keep the blender from forming a single, smooth vortex.  The square containers would help to make baffles more effective by providing larger areas with slower moving liquid away from the center of the vortex.