Ok this is the most useful toy I have found. Not only can you let them destroy them, but then you can recylce one you are done. Aleast I have. Emply water bottles, without the lids of course. Not only do they slide across the floor,which means chasing things around, but they make a lot of noise. Both of my dogs love them. When I picked out my lab with the breeder, this is what was in the kennels.