A system and method for stabilizing vertically stacked sheet material is disclosed. In the device body, a contact portion with an n-type electrode includes a crystal plane different from the major surface. This allows for the embedding within the content guide what could be additional commercial information. Cold fluid returns to a lower reservoir. Since the retention members are securely fixed to the corresponding latching member in a latching direction perpendicular to the mating direction of the connector, the connector will not move in the mating direction when the mating connector is inserted into or withdrawn from the connector.