So Phresh Gray Open Cat Litter Box, Large - Hooded Plastic Pan - Gray Litter Box with Reinforced Design in the Litter Boxes department at Lowes.com
White Sand Extra Strong – WhiteSand
Amazon.com : Fresh Step Advanced Clumping Cat Litter with Gain, 37 lbs Total, Extra Large (2 Pack of 18.5lb Boxes) + Glad ForceFlex Protection Series Tall Trash Bags with Febreze, 13 Gal, 110 ct : Pet Supplies