Oral compositions containing a polyorganosilsesquioxane particle, preferably polymethylsilsesquioxane particles, a fluoride ion source, and an orally-acceptable carrier. A first bulb image is captured when the LEDs are set in a power-on state, and a second bulb image is captured when the LEDs are set in a power-off state. The locking head has a top and a bottom. The first and the second contacting portions are in a mutual relationship such that, when the first contacting portion is press-contacted by the second contacting portion in the first direction, the second contacting portion is applied with component force in the second direction.