This is a product from the Zerobaseone popup! I've kept it at home since I bought it. I've never taken it out of its packaging. Please refrain from purchasing if you are concerned. You can put in Korean-style 4-cut photo stickers! Of course, you can put in photos of the artists, but I think it would be very cute to put in photo stickers with family and friends too ^_^ If you have any questions, feel free to leave a comment! #zerobaseone #zb1 #Hanbin #Jiwoong #Hao #Matthew #Taerae #Ricky #Gyuvin #Gunwook #Yujin