Firstly, the small space lets the babies take their position when they were still inside the womb. The fetal position while bathing relaxes the baby. Secondly, the small opening keeps the water warm for a long time than having a tub with a wide water surface area. It takes about 20 minutes before the water starts getting cold in the case of using tummy tub. The transparent material for the tub is assuring for the parent because they can see the baby from all sides of the tub that they can check if the baby’s legs and lower body are in an awkward position. Other features work towards its stability making it support the baby’s weight.

Tummy tub has been developed by midwives, medical doctors and psychologists. There had been many prototypes before the final make has been approved so they also come highly recommended by all three. They are often used in medical facilities such as clinics and hospitals. ASTM of the US, TUV of Germany and BSI of England have all tested and certified its specifications to adhere to safety standards.