Five days of one tinned fish is an experiment with an unknown ending, and your own body is what it might work on. The two faces preview a change without revealing it, one drained and one glowing. You click to learn which one you would become.
How the packaging works
Title
The title sets a strict, odd experiment with a clear time limit.
Thumbnail
Two versions of the same face hint at a change without spoiling it.
Remix this
Use this when you test a strict rule on yourself. Show the same person twice, before and after, and keep the result off the packaging so the ending stays worth clicking.