It is developmentally normal for babies to bite or chew on a straw as they seek jaw stability while learning to suck, but you can redirect this behavior by using a short, soft straw that is both safe and easy for them to manage. To encourage proper sucking rather than biting, place the straw tip on the lower lip instead of inserting it too far into the mouth, which helps promote natural lip closure. Additionally, you can provide gentle jaw support by placing your fingers at the base of your baby’s jaw to help them stabilize their mouth and focus on the coordination needed to draw up liquid.