Every cat we've had cremated has come back in a ziplock bag - with a label on it. That's just the way it is.

I love the ashes - they look like crushed sea shells. We put the ashes in a plastic, lidded box - along with a laminated picture and a copy of The Rainbow Bridge poem. They are buried in the backyard, and each site is marked with a brick - engraved with their name and years with us.