A regular 9x13-inch baking pan, which is too old to use for Best Cat Litter Boxes cooking, makes a great first litter box for a kitten. The low sides allow the kitten to get in and out easily. An old dish pan with higher sides might work great for cats who like to kick their litter everywhere. Use a plastic storage container that has about 6-inch-high sides, like the ones used to store clothing and blankets, also work very well. You can lay the lid down in front of the container to keep the cat from tracking the litter everywhere.