A structure for supporting a sample to be subjected to a surface enhanced vibrational spectroscopic analysis includes a substrate, a ground film formed on the substrate, and a base formed on the ground film. The fluid container is provided with microchannels that contain and guide sample fluid. Learning activities require user input and can be used to test a user’s proficiency of the corresponding subject matter. The device may be contained on pages of a book andor cards andor a plate. The over cap is screwed to an outer wall of a tubular spout that surrounds the neck of the bottle. The pushing board of locking plate is shifted toward the pillar to make the front end of pushing board stay close to the side of pillar and make the wedge unit wedge to the position limiting of clap plate for fast and exactly fixing the blade onto the blade rack.