I bought these new 2-3 years ago, but I've had them stored away since I finished orthodontic treatment. There are 27 pieces. They usually cost around 1300 yen for 50, so would you like to try them? I haven't kept them in direct sunlight, but one of the outer bags has some discoloration, like a stain. This doesn't affect the contents. I don't plan to include the outer box.