Try tightening the cup tighter to the base. If it continues to leak, you can easily slide off the rubber seal and replace it with a new one to create a new and lasting seal.
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If your Magic Bullet NutriBullet continues to leak, see the [https://www.ifixit.com/Wiki/Magic_Bullet_NutriBullet_Leaks?revisionid=HEAD|NutriBullet Leaks problem page] for possible causes and solutions.
Try tightening the cup tighter to the base. If it continues to leak, you can easily slide off the rubber seal and replace it with a new one to create a new and lasting seal.