I'm in the process of building a shelf on sliders that comes out of one of the cabinets for just this purpose. They way we did it was we took regular old food cans and screwed them directly to the board that will slide out of the cabinet through the bottom of the cans. The wife and daughters have had fun painting and decorating the cans. The project isn't done yet but I'll post pics when complete.
It is this basic concept but modified a bit...
CansMore CansYou can really get creative with the cans you use or how you decorate them. And it's something only yours will have.
I hadn't thought of adding padding...I'll ad that little detail.