More durable than chews made of generic silicone. Two inch diameter SentioCHEWS feature tough 24″L lanyards with breakaway clasps for active play. Dishwasher safe. FDA compliant. BPA, latex, and metal free. SentioCHEWS are not only functional but also discrete. Keep in mind that Chewlery wears out sooner with aggressive daily chewing. Made in Canada. Imprints on disks vary. Available singly or as a 2-pack.