. The integrated catnip pouch is great for refilling with fresh catnip to entice your cat into more play and exercise. The soft plush material is reinforced with Ruff Stuff material for added durability. FurHaven Catnip Crinkles Plush Cat Toy Set - Sea Slugs Coral and Kelp (2 PK) FurHaven s Coral & Kelp sea slug pals are two plush catnip toys your cat is sure to love.