An unusual thrift store discovery has sparked curiosity online after a woman purchased a set of five mysterious ceramic objects whose intended purpose was unclear.

Resembling question marks, the porcelain pieces prompted viewers to suggest a variety of possible uses, leading the woman to put their theories to the test in a follow-up video.

Her experiment quickly went viral, with the post inquiring about the doohickies since accumulating more than 5.6 million views on Instagram in the last few days.

The unusual find was shared by Amy, known on Instagram as @yours.truly_home, a content creator who specializes in thrifting and home decoration. Her videos frequently showcase secondhand items she discovers and how she incorporates them into her living space, with several of her previous posts attracting widespread attention.

In her recent video, Amy introduced her followers to a particularly puzzling purchase: five question mark-shaped ceramic objects whose original function she could not identify.

Rather than attempting to solve the mystery on her own, Amy invited viewers to share their theories about what the objects might be used for.

The responses inspired a second video in which she tested several of the suggested functions, demonstrating how the unusual pieces could potentially be used around the home.

The follow-up video also attracted millions of views as audiences watched her experiment with the different ideas in an effort to determine which explanation made the most sense.

Amy's video begins with a stitch from the previous video. In it, she films a mysterious object at a thrift store: A set of little question mark-shaped porcelain objects, which are white with green details.

There are five of them, and they are wrapped around a vertical stand with a vase that has similar colors. "What do you think these are?" Amy says, grabbing the set and turning it over to better inspect it.

"The thingy I thrifted with no idea what it was?? But YOU all had ideas!" Amy writes over the stitch as an instrumental piano cover of Billie Eilish's "What Was I Made For" starts playing.

"So I tested a few of them out," she writes, setting the odd objects down on a countertop.

First, she lays them all down facing each other, their tips touching at the center. After arranging them a bit, she sets a fondue pot on top of them. "A trivet," she writes.

Second, Amy sets only one of the objects on the countertop. the rest back in their stand and sets a candle in a jar on top of it. "Candle holder," she writes, before lighting the candle and moving it to the back by moving the object.

Still keeping the candle in the background, Amy grabs another of the objects and a napkin. "Napkin ring," she writes, potting a folded corner through the circular part of the object and then showing how it holds the napkin in its place.

Holding up an espresso in a little glass cup to the camera, she sets another of the objects down and puts the coffee on top of it. "Coasters," she writes, as the candle and napkin remain in the background.

Amy pours some cream or milk into the coffee and stirs it with a spoon. Then, she grabs yet another of the objects and sets it down as well, before removing the spoon and setting it down on top. "Spoon/knife rest," she writes.

Having removed the spoon, she sets the one she used as its rest once again on the countertop. "Toast rack," she writes, placing a slice of bread on top. "Google also told me it was for toast," she adds.

Amy gets out butter and grabs the toast to spread it on, before placing the butter knife next to the previously mentioned spoon on the fifth object.

Finally, Amy gets a freshly boiled egg and sets it down on one of the objects. "Egg holder," she writes, moving the egg by grabbing the object with her fingers.

In the comments, people suggested other uses for the objects, while some others made joke suggestions based on the fact that they are shaped like question marks.

Other users commented on some of the uses shown in the video, saying which ones had surprised them the most. Many others also laughed at Amy’s fitting song choice.