The present invention provides storage stable dry powder compositions of IL-4R. The guide device includes at least two guide profiles which can be moved against one another to move the cover over a roof surface adjoining behind a roof opening which can be closed by the cover. In this manner one jack stand may be placed over another so that the jack stands nest together in order facilitate storage and transportation. The filter chamber can be fluidly connected to a drain based on the position of a valve which opens when washing fluid recirculation ceases. A toothpaste tube may be provided in the cavity, and the toothbrush may have a removable head attached to a body that is joined to one of the case parts.