Store an emergency banknote with a little space to spare for a message with your vital details. It fits GBP, EURO, USD and every other note we have tried (the maximum size we have tried is 160mm x 82mm). That goes for paper and polymer notes too. Paper notes are marginally easier to fold, but we’ve not seen anyone struggle with it yet. Check out the project video to see the best way to fold your note to fit.