A timer device for a container with a handle mounted on a rotable axis, a locking device and a bar element. The locking device has a recess for receiving the handle, adapted to rotate between a locking position and an opening. The locking device in its locked position holds the bar element, while it in its opening position leaves the bar element moveable. In the locking position the bar element holds an opening of the container closed, while in the opening position tends to open the opening of the container. The device may be used for automatically opening a container, which may contain fodder for feeding horses, at a chosen time. Such a timer device for a container which has at least a first locking element and a second locking element is described
