The Blue Chewy Tube is designed with a larger diameter and an increased wall thickness for children and adults who have a strong bite. Blue Chewy Tubes provide oral-motor sensory input and are a resilient, non-food, chewable surface that will enhance biting and chewing skills. Non-flavored, non-toxic and FDA compliant. PLEASE NOTE: Oral Motor products are non-returnable. Chewy Tubes® are not recommended for use with children under 9 months of age.