I can’t recall where I heard of sardines as page markers and/or paper clips, but as I can’t eat sardines and do love office supplies, I thought I’d look for some. Both of these are available from Amazon.
The page markers have the more clever marketing. You can see a variety of colorfully patterned sardines here. Coincidentally, I found a couple of items at the Morton Arboretum gift shop that turned out to be from the same company.
I like the colors and the shape, but I’ve already bent the tail of one with a skeleton design. They’re thin and lightweight (paper) and can’t be tossed into a bag (which isn’t what I did).
The sardine paper clips are more basic and less colorful, but I’m guessing the tin is more true to the shape and feel of a real sardine tin. When I looked up that link, I found I’d seen that company’s kitchen products on Amazon and even have at least one of them: Splatypus, a duck-billed spatula (well, I have two).