I needed a case to carry 4 passports in my cargo pants pocket while travelling around. This case should protect the passports from getting wet from the rain, as long as it's closed and kept vertical in the pocket.

I've designed a small latch system to prevent accidental opening. The lid can be opened easily by squeezing the box a bit.

It is designed to snugly, but not too tightly, fit 4 standard Australian / US passports. I've included the original Fusion file so you can modify it to suit your passports.