We accidentally ran the blender with the original plastic cap in the bender jar and it destroyed it. Amazon didn't have anything that matched without buying the entire lid so I created my own.
This was designed to replace a KitchenAid KSB5600B1 lid cap. it may be the same for other KitchenAid blenders.
I printed it as shown without supports.
The author marked this model as their own original creation.