Abstract: A dual chambered beverage bottle made of synthetic resin is described. The bottle has a cylindrical body member that is divided by a partition wall perpendicularly disposed in the body member to form separate chambers, so that it is possible to contain two different drinks in the chambers. The beverage bottle has a cup which is secured to the bottle spout member as a cap in a substantially liquid-tight relationship, so that users do not need a separate cup to receive drinks poured out of the bottle and may enjoy greatly enhanced convenience when traveling or engaging in sports activities.