The Evolution of the (Ofurô) Hot Tub Style for Babies! With a special design, BabyTub Evolution 0 to 8 MONTHS old makes your baby's transition from the maternal womb to the new world outside much easier and calmer. Turn the Bath into a moment of comfort and relaxation. Its unique rounded internal shape is designed to promote the perfect match for the baby's back. It promotes a sense of safety similar to what they felt while they were inside the mother's womb. It is produced with non-toxic raw material, that meets FDA requirements, its design is special to provide even more comfort and safety at bath time. Its base is stable and safe providing a protected and relaxing experience with benefits that go beyond a simple bath.