Medela Swing Maxi Freest Flex Tube (1 piece) With the Medela Swing Maxi Flex Tube, you can easily replace the current tube of the Swing Flex breast pump. After some time and/or if the breast pump has not been used for a certain period, it is advisable for hygienic reasons to replace the tube of the breast pump. Changing the tube is a breeze. Breast milk is the best for a child's development. The World Health Organization recommends exclusively breastfeeding the child for the first six months. Furthermore, breast milk remains an important supplement to solid food until the child is two years old. Breastfeeding not only provides the child with nutrition but also protects the baby from infections and promotes the mother-child bond.