Size: Diameter 37X H 63 mm

Weight: 5.4 g

The special design valve prevents the problem of nipple collapse and helps eliminate colic symptoms such as gas and spit up by reducing the build up of vacuum.

Made of transparent, medical grade liquid silicone material, which is heat-resistant, non-toxic, non-sticky, odorless. No Nitrosamines contains. They are also all complies with the FDA, EN14350 standard.