A device for use in an oral healthcare or other procedure includes a ring having a base and two arms extending in opposite circumferential directions. An upstanding receptacle having a flexible wall is mounted on the base. The two arms may partially overlap. Each arm may include a radial tab at a distal end, and a lateral lobe turned toward and overlapping a portion of the other arm. A cup may be inserted into the first receptacle. A pedestal may extend outward from the base within the receptacle. Anti-rotation pins may extend upward from a top surface of the pedestal, the anti-rotation pins contacting and engaging the cup. A sunken receptacle may be formed in the base. A flange extending at inclined angle may overhang the interior space.
