Catty Stacks Designer Cat House - Tickled Pink (One Cube) Eco-Friendly - recycled, recyclable, soy-based inks, reusable hardware, minimal packaging Economical - less expensive than cat furniture of similar size Super Strong - Heavy-duty, industrial strength corrugated board suitable for cats up to 20 lbs Modular - easy to add or replace boxes over time Cats LOVE Boxes - people who live with cats already know cats have a strong natural affinity to boxes