*One NEW cup adapter* This Cup Holder Adapter fits the standard Nutri Bullet cup, the mini juicer Magic Bullet cup, as well as allowing most sizes mug, cup, or bottle fit in your vehicle?s standard cup holder. *Does NOT fit the "Magic Bullet Nutribullet Prime Oversized 32 oz Colossal Cup with Handle" (Will likely also fit a Nutri Ninja cup- I do not have a NN cup to compare put I have examined photos and they both are 32 oz and appear the same size. If your Nutri Ninja cup does not fit you can return this adapter within 30 days.) Durable, supposedly dishwasher safe, and portable Cup Holder Dimensions: Top diameter is 3.5", Bottom diameter is 2.5" The very bottom circumference of this cup adapter is about 8" around- at the base. Ruler not included. Feel free to ask questions. I do offer returns within 30 days if you are not satisfied. This item is from a smoke free/pet free home. If you have any concerns upon arrival, please contact me before leaving feedback so that I can take care of the problem first. Thank you for reading my ad and have a great day!