Abstract: A sealing unit for sealing a jar includes an inner cap having a flange and an outer groove is defined in the outer periphery of the flange. A resilient ring has a bent portion which is engaged with the outer groove. An outer cap has an annular recess in the underside thereof and the flange of the inner cap is engaged with the annular recess. The outer cap has an inner groove defined in the inner wall thereof and the resilient ring is engaged with the inner groove. A linking member extends through the outer cap and is connected to the inner cap. A lever is pivotably connected to the linking member so as to drive the linking member which moves the inner cap upward to squeeze the resilient ring to be deformed so as to seal the smooth inner periphery of the opening of the jar.

Abstract: A toothbrush has a head, and a handle; the head is formed with upper and lower portions joined to each other, which together have an inverted L shaped cross-section. The upper portion of the head is joined to the handle such that the head is rotary. The head has first and second bristles on a lower side of the upper portion, and an inner side of the lower portion respectively. Thus, the first and the second bristles can be pressed against, and moved over, top and one of lateral surfaces of a row of teeth for cleaning both of them respectively at the same time; the head turns to change orientation thereof relative to the handle according to curvature of different sections of a row of teeth, on which it is being moved along, thus increasing smoothness of movement thereof.