These are leftovers from a box of 5 that was opened 6 years ago. The bags have not been opened and were stored in a dark place. Each one has a white-ish area as shown in the third image. I tried wiping them with water, but it didn't come off. I haven't checked the contents, so I can't guarantee the quality. Since they are unopened, I think they should be fine, but there's a possibility they might not be usable, so please consider it a gamble.