The Tilty smoothens the transition for babies from bottles to regular cups. The wall of the cup is angled in such a way that the fluid starts as soon as the baby starts to drink from it.
The biggest challenge in transitioning babies to regular cups is teaching them to not dump the fluid over themselves when they tip the cup as far back as the bottle they are used to drinking from. Tilty is designed in such a way that the tilt required to dispense the fluid is reduced. This helps babies who are learning to drink from cups.