Bottle bank

For bottles that have an annular shoulder around the neck of the bottle and adjacent to the opening of the bottle, a lockable, slotted cap which can be removed at the will of the owner when the owner deems that savings objective has been achieved, said cap being segmented and hinged to enclose the annular shoulder of said bottle when closed, the interior configuration of said cap conforming generally to the exterior of the said annular bottle shouder when closed and adapted to be ocked in pace to prevent operation of said hinged portion.