Petco offers discounted price when you bring your empty tub of their brand litter back. : r/ZeroWaste
Dr. Elsey's Precious Cat Ultra Clumping Multi-Cat Clay Cat Litter - Unscented, Low Tracking | Sale Can't miss savings | PetSmart
Cat parents: Petco (and possibly Petsmart) lets you refill your old sophresh kitty litter tubs at a discounted price as opposed to buying another tub! : r/ZeroWaste
Fresh Step® with Febreze™ Clumping Multi-Cat Clay Cat Litter - Scented, Low Dust | Sale Extra $10 off $50+ Same-Day Delivery | PetSmart