Medela Breast Milk Bottle With Calma Teat, 150mLThe Medela Breast Milk Bottle With Calma Teat is designed exclusively as an alternative to breastfeeding for mums wishing to feed their babies with breast milk. It was developed in cooperation with breastfeeding experts from the Hartmann Human Lactation Research Group at the University of Western Australia. Calma allows your baby to suck, swallow and breathe just as they learned on the breast: Your baby can drink, pause and breathe in a natural