Our dog has broken and chipped half these "permanent" chewing fun in size M (approx 10x7cm, so anyway very small) for 15 euros incl. Shipping within 15 minutes. For that price completely insufficient quality. We buy back the Torgas that chipping even sometimes a little off, but then just outside and a little. This coffee tree tuber is totally overpriced, considering that the dog is just as fast as a chewed wood from the forest floor.