There isn't a logical thing to do with cat ashes. When our second cat died I used to keep her ashes in my sock drawer. Then another cat joined her. When many years later our third cat died, I really had to rethink the sock drawer scenario. Now, with Nose being gone, there is a neat stack of four boxes. And I can't decide what an appropriate resting place would be for them.
I have considered burying the ashes, but what if you move? And taking them to the ocean to join our fathers, but cats don't really like water.
A new option has appeared -- making the cats into diamonds.
Discuss amongst yourselves.