Mayo and Ketchup stand/support Ø29 mm

To get the last in my Heinz ketchup and Kewpie mayo bottles, I want to store them up-side down. But got irritated of them falling out from the fridge door when stored so.  

This is designed so it can be clipped on into the slot just under the cap. It can remain in place when opening the cap. 

Same diameter of Ø29mm fits tightly 337g Kewpie and also 570g Heinz bottle (not as tight, but it works well)