It’s says that it only fit certain models but it does fit mine and it states it doesn’t ??There are so many models of the Nutri Ninja that you have to be careful that new parts will fit. These worked perfectly with my BL 455 and so far have been great in the larger size. We bought other replacement cups that split on the seams, but so far these have held up. I will give an update after a while as to durability.I make two smoothies for my husband and me and I’ll he existing ones were too small! Found this larger one and it’s perfect! No more overflowing smoothies! Yay!This canister works perfectly on my Ninja IQ and the lid seals up tight -- doesn't leak!I LOVE these! I needed a little extra room for my smoothie ingredients since most are frozen and don't settle down well. This cup is absolutely exactly what I needed. Extra room for cramming frozen berry blocks with all of the same features of the slightly smaller cup. I was lucky and had a really long reusable straw. If you don't have one order one up because the cup is as deep as a regular straw.Good bottles, but I do not like the way they packed it, stucking two bottles and lids inside of a tiny paper box, no Ninja logo, little bit overpriced, other than that, I'm satisfied with the product.Liked the increases ounces; the original was just not enough.I love how much more I can get into these and how they're lareger without being bulkier. Here they are next to the standard 24oz cups that come with the ninja foodi for a little side by side comparison. Everything fits like a charm and I've had no issues with leaking, so fari may have not paid attention to the model but i hoped it would fit exactly the ninja blender i got. like how many ninja blenders are out there?!these are perfectly fine on their own but i wouldn’t mix the lids to the ones that came with the blender, you’d think they are interchangeable but they actually aren’t. well they fit but if u use these lids to the original containers they seem to leak. and these containers don’t go all the way in to lock the blender, but enough to activate the blade. shipping was quick, but still i find it pricey for something that’s disappointingIn the answers and rating sections you will see the vendor stating these fit BL620C cups. THEY DO NOT! I had to send them back as a result.These make life easier, now we have enough to make a breakfast and lunch smoothie without washing! Woo hoo! Love the Ninja, love the extra accessories! These caps close nicely too, they seal well, no leaks and the shape of the spout is good for pouring and drinking. Well engineered! Love the design!Exactly what I needed! The cups were identical to the ones I already had, now I have a lid for each where as I originally had one. They along perfectly in my blender with the existing blade I had. I will definitely be buying more in the near future. Delivery was also great!In the answers the seller stated these cups worked for the BL620 c model. The cups are too wide so they don't fit the blade. The build quality otherwise looked good.