Assuming you want to clean the blender:
To remove the bottom of a Nutri Ninja Blender, start by unscrewing the silver cap at the base of the blender. Next, twist off the black plastic cover. Underneath this cover, you will see a small white rubber seal. Gently pull up on this seal to remove it. Now you can lift off the bottom piece of the blender. Be careful not to lose any of the small parts that may have come loose with it!