| 摘要 |
A toothbrush comprising a head, a neck, a handle, a handle end, a head end, an outer surface, an inner cavity and a longitudinal axis. The inner cavity has a surface defining a cross-sectional area. The inner cavity has at least one of a greater cross-sectional area bordered by two lesser cross-sectional areas along the longitudinal axis of the toothbrush or a lesser cross sectional area bordered by two greater cross-sectional areas along the longitudinal axis of the toothbrush. The outer surface defines an outer surface cross-sectional area. A wall is formed from the outer cavity surface and inner cavity surface. The toothbrush comprises a single unitary component along the entire length. |
