Neat tamper-evidence packaging concept: a random pattern of beads that's modified when you open the package, along with a smartphone app to automatically verify the pattern is correct.
Reusable glitter basically: to fake a seal, you need to make the significant effort of positioning each bead in the right place. Possible. But very time consuming.
I'd buy one!
@pete Neat indeed! Hacker injects water, freezes it, opens box, takes out cookies, closes it, dries it, ... easy :D
@pete To me the mechanism looks like a cap on a cap on a jar. The friction between cap 2 and jar makes cap 1 rotate against cap 2 and only that mixes the beads for quarter a turn at which point the caps block and allow you to turn them against the jar. If turning it over changes the pattern, it's probably too fragile for any practical use.