Unfortunately, my ninja coffee maker is not able to fit any other tumbler, and I lost the original, so I had to buy this one. It's pretty expensive, but I bought it because I make iced coffee frequently. Not amazing at keeping the coffee cold, though.

I travel often and this was a great protein to keep making my protein shakes while I am away. Would definitely purchase again

I go to the gym daily, and every day I make a protein shake directly afterward. I use ice, a banana, protein power, peanut butter and milk. My ninja continues to grind through the ice and mix all my powder together with the rest of the ingredients for the perfect shake. I use the personal cups for my shakes. I used the large blender for mixed drinks and it blends throughly and completely. I will say, I’m genuinely impressed with my ninja, if you like/want the convenience of a personal cup, and the performance of the larger blender, this is for you!!!

Bought the Ninja brand containers thinking they would be better quality than the off brand, but disappointingly, one of these lids doesn't quite latch on - so that one is not leak proof. The other three are great. Do like that the lids are different colors, though sort of wish one of the colors wasn't gray, since the original two that came with the machine were also gray.