Chewy Tubes help you teach chewing, biting and normalization of oral habits, essential oral motor skills needed in an OPT program. Chewy Tubes help you teach chewing, biting and normalization of oral habits, essential oral motor skills needed in an OPT. It is integrated in a hierarchy with other tools in the Bite Tube Set and in numerous exercises described in “Assessment and Treatment of the Jaw – Putting It All Together: Sensory, Feeding and Speech.” Many Speech therapists use chewy tubes in speech therapy sessions.