I made this thing, appreciate the attention and kind words, to answer some questions/concerns:

- Paper is BPA free, got it from here https://www.amazon.de/dp/B0932QVYBQ

- Photos do have a lifetime, although no idea how long, the ones I have for a while seem to do better than the average store receipt

- It's not really _poor man's_ polaroid, but as someone else mentioned, price difference is not that big, while a single photo is a LOT cheaper

And there's a permalink for english language, in case OP or someone else can update it - https://boxart.lt/en/blog/poor_mans_polaroid