Its ergonomic shape helps to support the baby's head in an upright position safely and comfortably for the baby. It has a non-slip rubber backing to support the baby's back , ensuring that the baby does not slip as well as its own comfort. Its size allows the water to remain at the right temperature fr longer and you don't have to add water. Relieves colic and calms the baby. Stimulates physical and cognitive development. From birth to approx. 9 months (8kg). BPA FREE and easy cleaning.