things that exist or are used or enjoyed for only a short time.
items of collectible memorabilia, typically written or printed ones, that were originally expected to have only short-term usefulness or popularity
I picked up a long postcard from the Oyster Bar which was perfect for the cover of my little book. There was a role of Washi tape on my desk when I was working on the project which turned out to be perfect for sticking things into my book. The pages were sewn together with bakers twine which I also use for the ties to close the book.
Have a fun day!