I have an original C series or TNC machine. I was always envious of the new low stature containers and when I noticed there was a 1.4l container available for my C series, I bought it. I have to say, it is nowhere near the quality of my original container. The clear plastic handle is quite thin and the lid is made from a hard plastic. This renders it completely inflexible and hard to fit.

We have had our Vitamix for 2 years and we love it. The only problem is the interior or the plastic container scratches and gets cloudy making it visibly unattractive. Only dish detergent is used to clean it. We only use vegetables in the blender and avoid seeds and acidic substances such as lemons. I'm not sure why this interior deterioration occurs. If you could make a glass or Pyrex container that would be wonderful. But the plastic just doesn't compare with the quality of the machine.

I bought this 48oz container because the 64oz one that came with my 7500 is too large for smoothies and small servings of frozen desserts. The smaller container great for smoothies, nut butters, sauces, and hummus. I give 4 stars instead of 5 because it's hard to clean. For anything thicker than a smoothie, food gets stuck to the metal ring under the blades. Blending with dish soap for 30 seconds, as recommended, doesn't get all the grime. I've tried soaking it in vinegar, to some avail, but for the most part I've resigned myself to having a not entirely clean container.