The spray bottle reservoir system includes a bottle having a neck and a body, the body defining a main chamber for containing fluid. A spray cap is detachably mounted to the neck. A vertical partition is disposed inside the body, separating the main chamber to form a dispensing reservoir. A dip tube extends from the spray cap to the bottom of the dispensing reservoir. The dispensing reservoir may be refilled from the remaining chamber, and due to the relative small volume of the dispensing reservoir and the viscosity of the fluid, the dispensing reservoir permits maximum consumption of the fluid in a wide range of spraying positions.