I have not managed to find only one possible use, or for baby food jars or for things to chop. Very disappointed.
I found the concept of 4 glass tanks with ideal cover for small pots.
Note that a friend of mine who has Major robot, not the Cooking Chef, has no problem with its mini-tanks. He tested my own on my robot, confirmed that the seals were well positioned, but encountered the same problems as me.
So far so we have no explanation for the failure, except the model of the robot.
Very disappointing from Kenwood, especially considering the price of the robot and each accessory.