From what age/weight can the Stokke® Flexi Bath™ be used?

The Stokke® Flexi Bath™ tub is recommended for children between the ages of 0 – 4 years. For additional comfort, the optional Stokke® Flexi Bath™ Newborn Support is recommended from birth to 8 months old, but with a maximum weight of 8 kg/17.6 lbs.