I never thought that beauty mask can be used as souvenir. But now that I think about it, yeah, that’s possible. Especially, if there are lot of unique variants available, like what you’ll see often in Japan and Korea.
I got two beauty masks above from one of my close friend who go travelling to South Korea; they’re Honey and Pomegranate variants.
If you’re interested to make it your next souvenirs, there are a lot of other substances available on this brand (psstt, bamboo catched my eyes!) Maybe there also a lot more variants on another brand, your choice. And also, in my opinion, not just a beauty mask… but another simple beauty kit can be used as souvenirs too. Good luck!