Tip of nipple is engineered with triple rings for better flexibility and durability. Soft texture tip with thicken base to minimize vacuum being created during feeding. Improved sealing on the rim stop any possible leakage. Extended venting valve to prevent backflow of air bubble. Uniquely designed shape and texture for baby to feel like natural breastfeeding.

Age Range (Description): Baby. Material: BPA Free, Phthalate Free, Latex Free, Lead Free. Size: Set of 2, Large. Brand: Simba. Best Sellers Rank: #41,176 in Baby. Customer Reviews: 4.2 4.2 out of 5 stars 58 ratings 4.2 out of 5 stars. : B014804H6K. Item Weight: ?0.704 ounces. Batteries required: ?No. Material Type: ?BPA Free, Phthalate Free, Latex Free, Lead Free. Item model number: ?P6353. Product Dimensions: ?2.36 x 1.97 x 4.72 inches.