A removable storage compartment system for bicycles is provided. The removable storage compartment system has a plurality of generally cylindrical containers wherein each of the individual containers is secured to another container or to the frame of the bicycle. The generally cylindrical individual containers may be insulated so as to allow a user to transport warm or cool items. Each of the plurality of individual storage compartments may be of different sizes so as to allow a user to best select the total desired storage area for the bicycle and to allow a user to store the individual storage compartments inside one another.