Oh this wretched hay fever, I must try the ... Carbolic Smoke Ball : gives instant relief.
The pattern
This still is filed under Keepable trade card.
Define
A small card people keep (pretty, useful, or collectible) that carries the brand after the encounter.
Mechanism
Retention object. The gift is the media. Recall is paid for by usefulness or delight, not by repetition.
Verdict
We can put a physical or digital keepable in someone's pocket and they will not throw it away.
Why it works
The interactive flap design literally demonstrates the 'before and after' effect of the product. The physical action required by the reader to reveal the solution creates engagement and memorable impact.
Steal this when
You want to dramatize a rapid 'before and after' transformation in a physical mailer or handout.