A variety of computer based service that permit users to edit, compose, upload, or otherwise generate content also provide for the integration of sponsored media into presentations along with user-generated content. The base may also have a stacking ring having an inner portion and an outer portion, where the outer portion merges with the inner portion of the standing ring. Here, in the main flow channel 12, the flow channel lengths of the flow channels 12b to 12d between adjacent introduction points 12p to 12s are not longer than those of the flow channels 12a to 12c between the next previous adjacent introduction points 12o to 12r in a flow direction of the raw material M1. Source and drain electrodes are formed on opposite end portions of a channel region of the channel layer. An interface is created due to this size differential, which provides a visual or tactile cue of applicator insertion depth, and thereafter object positioning within the body cavity.