Collider drives 28% repeat purchase uplift with Paper Run's handwritten-style welcome notes

Collider drives 28% repeat purchase uplift with Paper Run's handwritten-style welcome notes

Welcome Note

Welcome Note

Welcome Note

28%

28%

28%

Increase in

Increase in

Increase in

Second Purchase

Second Purchase

Second Purchase

Collider's welcome postcards are turning first-time buyers into repeat customers

Collider's welcome postcards are turning first-time buyers into repeat customers

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Who is COLLIDER?

Collider is a functional beer brand built for people who want to feel good without the hangover. Their drinks combine calming botanicals, adaptogenic mushrooms, and thoughtful ingredients to deliver a mood-lifting, social experience without the usual trade-offs.

But Collider isn't just a drink. It's a world. Bold design, a confident attitude, and a brand identity so sharp it practically has its own gravitational pull. Their tagline says it best: beer that's out of this world.

Co-founded by Harry Cooke, Collider has rapidly built a loyal following in the functional drinks space. Their product does the heavy lifting. When something actually works, customers come back. The question is how to make sure they do.

Between Order One and Order Two

Getting a first order is one thing. Earning the second is where retention is really won.

Collider's product converts. Customers try it, enjoy it, and want to come back. The challenge isn't the product, it's the noise standing between a great first experience and a second purchase. Email inboxes are packed. Social feeds move fast. Even customers who loved their first order can drift if nothing pulls them back at the right moment.

Collider wanted to find a channel that could reach customers when the excitement of their first order was still fresh and deliver something that felt worthy of the brand they'd just discovered.

Print Daily, Convert Consistently

Collider launched a welcome note flow with Paper Run, timed to reach new customers in the days following their first purchase. The piece re-introduces the brand, thanks customers for taking the leap, and includes a clear incentive to come back for more.

The flow runs automatically. Every day, as new customers place their first orders, the flow prints and ships, no manual intervention, no timing inconsistency. The creative reflects Collider's identity, the same confident tone and sharp visual language customers recognize from the brand. It doesn't feel like a follow-up. It feels like an extension of the experience they just had.

Attribution is hard. Collider wanted to be sure they could measure the real impact of direct mail. So they ran a holdout test within Paper Run's platform. Half the audience receives the welcome note. The other half does not. That split renders results scientific and reliable; no need to wonder if it's something else driving the outcome.

Results: Out of this World

5.2x

5.2x

Incremental
ROAS

Incremental
ROAS

Incremental
ROAS

28%

28%

Increase in

Increase in

Increase in

Second Purchase

Second Purchase

Second Purchase

The customers who received the welcome note converted to a second purchase at significantly higher rates than those who didn't. A 28% lift in second-purchase rate isn't marginal. It's a meaningful shift in the economics of retention, driven by one well-timed piece of physical mail.

The flow continues to print and ship daily, quietly compounding those gains as Collider's customer base grows.

“It looks great, it feels like us, and the results are seriously strong. When something works this clearly, it is hard to ignore.”

“It looks great, it feels like us, and the results are seriously strong. When something works this clearly, it is hard to ignore.”

Harry Cooke

Harry Cooke

Co-founder

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