Rounded for Wide neckNipple/teat for babybottles, made from natural rubber. The wideneck nipple/teat offerss a variable flow. Little numbers indicates the flow. 1, 2 and 3 for beginner, medium and fast flow. EcoBaby nipples/teats has a standard size and will fit most bottlebrands, ie. the Wide neck bottle from Green to Grow. ![]() |