Product description Style Name:Medium Flow Product Description Designed in conjunction with breastfeeding experts, the revolutionary new Tommee Tippee Closer to Nature Easi-vent teat mimics the natural flex, movement and softness of a mum's breast, to make switching between breast and bottle easier than ever before. The unique shape of the Closer to Nature Easi-vent teat encourages your baby's natural feeding action so that switching between breast and bottle becomes second nature. With its unique Easi-vent anti-colic valve (which you can actually see working) the Closer to Nature Easi-vent teat is at the heart of an entire breastfeeding support system which also includes a breast pump, sterilisers and accessories specially created to help you combine breast and bottle feeding. Teat collapse resolution There are two reasons a teat may collapse. One is an indication that your baby is ready for a faster flowing teat and may be sucking so hard that the teats can not release the air fast enough and collapses. The