Level 4 Wide Mouth Silicone Teats: 9m+. Designed with medical professionals and mimicking nature, its curved shape made of soft silicone is more flexible at the top of the teat and gradually firmer at the base to help the baby have a comfortable latch on and avoid nipple confusion. With 93% acceptance*, the new Options+ Anti-Colic bottle teat is similar to the mother's breast for a more natural feeding, avoiding nipple-teat confusion thanks to its wider base that makes it easier to latch on and open the mouth. Features: The teat is 100% medical silicone and is laser-perforated, ensuring the highest quality as the hole is exactly the same on all teat levels, giving an exact, timed flow. The Options+ Wide Mouth teat is more similar to the mother's breast to encourage a better latch on and reduce nipple confusion. BPA Free.