The average lifespan of a bottle teat is most likely 2-3 months. But if you see a few signs of deterioration, you will know it’s time to change the product. For instance, if you see the liquid is coming out fast and not dripping steadily, it is time to change. The teat’s hole becoming bigger is not always a matter of quality because sometimes babies chew hard, and this happens. Also, you see colour changes in the teat, thinning, or any cracks & breaks; these all are signs of replacing the teat with a new one. So, keep checking all your baby products to avoid any discomfort.