I want to love this blender, but I have been searching high and low for a 4” six fin female blade and 2 16oz cups to use this blender for smoothies and such too. I have been unsuccessful 3 times now and can’t find a female blade attachment for this unit TB201.   The 6 fin female blade 4” across attachment so far does not exist. Every 4” cup with 6 fin blade and female has been too small to fit over the male piece on the blender. And when I search on the Ninja webpage, nothing pops up for the TB200 series….  Super bummed here.  This was the first blender I ever bought that I believed I could make smoothies to go with and was so excited to do so. Really disappointed..☹️