Secret text / Password vault for one-time opening

This is a container for safeguarding confidential information, inspired by the red card featured in films and television dramas that store nuclear codes, emergency response procedures, and critical personnel contact details, commonly known as "The Biscuit".

I've made some improvements suitable for 3D printing, with the sticky notes being placed vertically inside to prevent warping issues. The internal storage space measures 45mm × 80mm × 1.2mm, which should hold approximately three to four layers of sticky notes.

The print profile includes a pause, roughly one to two minutes at the end, during which you need to insert the sticky notes. Once printing is complete, those notes will be permanently sealed within the card's interior. Unless the card is forcibly broken off, no one can view the information inside. if your filament is accurately calibrated, it should be waterproof.