Two Pack 16-Ounce (16 oz.) Cup with Sip & Seal Lid Fit for Nutri Ninja blender series with BL660/BL663/BL663CO/BL665Q/BL771/BL773CO/BL780/BL780CO/BL810/BL820/BL830/QB3000/QB3000SSW/QB3004/QB3005

As far as value for money, these cups are good replacements for the OEM ones. I just don't understand why any of these replacement cups don't have the measurement marks that the OEM cups have! They have a max-fill line, but no other measurement marks.

Works with the model Ninja I use - just like the description said it would!

I use this a lot for blending, drinking and chopping small quantities of meats for my pet. Because of the heavy use, I find myself replacing all that become cracked or extremely cloudy and don't look clean for continued use. It's been a lifesaver for me for on the go activities as well as I blend and go.

Works as advertised and fits blender perfectly

My dietary needs mean that I am using my Ninja blender very frequently, so it became apparent quite quickly that I would need additional cups. These meet the minimum requirements and fit my Ninja perfectly fine, but it's worth noting a couple things.First, the only marking is the maximum fill line, something I now see in the image of the product, but easily missed when purchasing. This basically means that now when I make a shake requiring 8 oz. of milk, I need to dirty a measuring cup as well, which requires having more measuring cups around to use and more dish-washing afterwards.Second, I haven't used them enough to determine how problematic this might be, but these cups have less threading for the covers than the original cups. Some other reviews mention leakage and I assume this is the likely cause.Finally, for those worried this won't fit their Ninja, it's probably most important to check and see how many tabs your cups have to lock into the blender. These have 4, so if yours takes 3 or some other number, they aren't for you.

Okay so I was on the fence about these at first but most of the objections in the reviews were minor. No 8oz mark on the side? Measure it once and grab a sharpie to mark the side where 8oz’s is! I mean come on! And the threads not meeting right? Turn it counter clockwise till it sits right and then screw it on. So far these have worked great!

We needed extra cups for our Ninja Blender. I was worried that these wouldn't fit/work because they were off brand, but they work like a dream! Sometimes the blades are a little tricky to screw to the cups, but nothing a little patience won't handle. Highly recommend!

Good replacement cups for my ninja blender. The only negative part is that it doesn't have the ounces printed on them.

After buying three lots of these the third delivery actually fitten

Fit my ninja blender perfectly!