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  • 25-APR-2026 | Claude Hopkins’ “This 10-Day Test” Pepsodent Ad

25-APR-2026 | Claude Hopkins’ “This 10-Day Test” Pepsodent Ad

The Vault from Copywork365

The swipe file is dead.

Literally, and maybe figuratively as well.

When I first started working on this project, I gave it the working title, Toolbox. The simple tagline was: the swipe file on roids.

But the more I worked on it, the more it became clear that this wasn’t just a box of tools. Calling it a swipe file wasn’t accurate, either. Roided up, or otherwise.

Because at its core, the swipe file is merely a collection of pictures or text. A pile, in other words.

This thing behaves more like a navigable map.

And no matter how much stuff you hoard into a swipe file, its contents are inert.

This, on the other hand, grows deeper over time. Its contents are living.

So, henceforth, this will be known as…

New illustration — credit Pranav Venkitaraman.
Big thank you to Pranav!

The Vault is an atomic copywriting database. As far as I know it’s the first of its kind, so that’s what I’m calling it.

It’s a database of world-class excerpts just like the ones we cover right here on the daily. Spanning ad copy, webpage copy, and literature.

Each excerpt is x-rayed and dissected to reveal what makes everything tick, how it works — on the most granular level. (Hence, atomic.)

It covers all the tools, techniques, and psychology we touch on here, but in their full depth. Making it easy to master these “devices” and then apply them to your own persuasive writing. You can even filter by author or brand to steal the secret sauce from your very favorite writers, copywriters, and brands.

Same as before, I’ve still got a forever deal for you.

If you join the waitlist below, you get exclusive lifetime access for an ultra-low flat fee when The Vault launches. (It’s looking like Q1 or Q2 of 2026.)

After all, a sweetheart deal is the least I can do to thank you for your support.

And as I’ve mentioned before, yes, I really do mean lifetime.

Even if the internet ceases to exist. I’ll toil day and night to make sure you receive a physical copy. With however many thousands of excerpts this accumulates over its lifetime.

Pinky promise.

Claude Hopkins’ “This 10-Day Test” Pepsodent Ad

This 10-Day Test
Has shown millions the way to white teeth

This is how millions have found the way to whiter, safer teeth. You see the results on every hand — perhaps in teeth you envy. Send now for this simple ten-day test and see what you own teeth show.

Why teeth discolor

There is on your teeth a viscous film. You can feel it with your tongue. It clings to teeth, enters crevices and stays. That film is the teeth’s great enemy. It dims them and destroys them.

The tooth brush fails to end it, for the ordinary tooth paste cannot dissolve it. So for months between your dental cleanings it may do a ceaseless damage. 🏁

One of the most famous long-copy ads ever, from the father of modern advertising himself.

First paragraph: a social-proofed promise, a poke at the ego, then a brief call to action. But the CTA leaves you with unanswered questions — hence you read on.

Second paragraph: time for pain. Sparing no details, let’s dive into how your teeth are rotting away.

And crucially: everything is oriented around “you.”