SeedLocker – Tamper Evident Container

SeedLocker is a reusable, tamper-evident storage solution designed to clearly show whether a container has been opened.

Inside the lid, a built-in mechanism locks a set of beads into a fixed position whenever the jar is fully closed. If the cap is even slightly twisted, that arrangement is disturbed, immediately signaling potential access.

Each time you close the jar, the beads settle into a unique, one-of-a-kind pattern that cannot be duplicated. By taking a photo of the pattern after sealing, you can later compare it to the current state to verify that the contents have remained untouched.

Here are videos demonstrating SeedLocker in action:

https://x.com/sesi_the_man/status/1910075587622031612/video/1
https://github.com/user-attachments/assets/591b7467-79ee-483a-ad4c-2a15a1c9a6f4

Want to print you own? Seedlocker is fully open source! https://www.printables.com/model/1207482-seedlocker-a-reusable-tamper-evident-container-for

Please note that these items are printed using a gradient blue/white filament. Because of this, the color pattern will be unique for each print. In some cases, a print may appear mostly white or mostly blue rather than an even mix of both colors.