Modular and flexible interchangeable brush system to scrub a container. The brush system includes a handle having a first core and a second core. A sleeve is provided into which the first core and the second core are disposed. A flexible stem is removably connected to the first core of the handle. The flexible stem has at least one gap into which a resilient material is disposed. The location of the gap is at a bend location along a longitudinal axis of the handle. A first brush is operatively connected to the flexible stem, and a second brush is operatively connected to, and received within, the second core of the handle.