Sentence:  The appeal of certain pieces of <WSD>ephemera</WSD> lies in their design quality, like my tea bag tag. Yet another reason for assembling a collection is the desire to travel  back in time and connect to another era. Historically minded collectors may choose to focus on World War II memorabilia or a particular World's Fair or  Exposition. The desire to collect often encompasses more than one of these reasons. <WSD>Ephemera</WSD> takes on added significance precisely because of the unique, idiosyncratic ... 
Meaning of the word marked with <WSD> tags:  Objects that are designed to be short-lived.