As the baby learns to hold and manipulate the bottle, they develop their fine motor skills. This involves the coordination of small muscles in the hands and fingers, which is essential for tasks like grasping objects and writing later in life.

Holding the bottle requires the baby to coordinate their hand movements with their visual focus on the bottle. This helps to improve their hand-eye coordination, which is crucial for activities like reaching, grabbing, and tracking objects.

Allowing the baby to hold the bottle themselves encourages independence and self-feeding skills. It gives them a sense of control and accomplishment as they learn to feed themselves, fostering their self-confidence and autonomy.

As the baby grasps and holds the bottle, they are engaging their cognitive skills. They learn cause and effect as they understand that their actions (holding the bottle) result in a desired outcome (drinking milk). This promotes cognitive development and problem-solving abilities.

Holding the bottle requires the baby to use their arm, hand, and finger muscles, which helps to strengthen and develop these muscles. This can contribute to the overall muscle strength and control in their upper body.