An illuminating baby bottle with a removable container includes a first container, a second container, a release mechanism, a connecting member, a liquid-flowing system, a bottle cap, and a lighting device. The first container and the second container are axially attached to each other through the connecting member while the release mechanism is concentrically positioned in between the first container and the connecting member. The release mechanism selectively rotates in between a locked position and an unlocked position in such a way that the locked position separately stores baby formula and water while the unlocked position allows the mixing of baby formula and water. The liquid-flowing system releases baby formula mixture from the first container so that infants or young children can be fed with the baby formula mixture. The lighting device is positioned on the bottle cap and can selectively operate in between an on-position and an off-position.