A device for supporting a strip in the wound or spooled condition, includes two half-hubs each having at least one flange made by molding with the half-hub, these half-hubs being assembleable together to form a spool. The video thumbnail is preferably a relatively short, low resolution, animated video thumbnail. The guide has a supporting member for supporting a wafer and a stopper member for preventing the wafer from being inclined over a predetermined range. According to an embodiment of the present invention, both the protruding grip and the lever are configured to receive a pinching force that compresses the lever towards the fluid-containing body, facilitates carrying of the fluid reservoir, and facilitates installing andor releasing the fluid reservoir intofrom a chassis of the printing device. The replacement of one stepped element with another having a different stem length within the flow cell creates a reliable method to adjust the measured path-length of the flow cell.