
I bought a 40oz jar from Costco. The bottom half is smaller than the top. I thought it would easily fit in my car cup holder but it turned out to be too big. I was confused. Before that I bought a coaster, it was cheap, flimsy, and the weight of my cup made it tip over. However, this holder is AWESOME! It fits perfectly in my cup holder in the car. You just have to make sure that the diameter of your cup fits. I would buy this item again. And I have recommended it to my friends.

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