The single serve cup blends from the bottom with a more traditional blender blade design, whereas the jar blends through the middle with many different blades. (testkitchentuesday.com)
The fibres tend to wind themselves around my immersion blender blade, so I simply remove them from time to time as they accumulate while blending. (provincialpaleo.com)
The truth is, I needed a break, and some time to repair some mangled blender blades. (sbnation.com)