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On the wire
The Stash EdgeMACALLAN 1926June 11, 20262 min readAd-free

ThirdLove adds nipple covers to catalog, targets $400M white-space category inside existing customer base

The intimates brand skipped guesswork and mined its own purchase data to launch an adjacent product customers already needed.

Jenny Huang Goodman MPA MSc MHSAThe Stash Edge · Huang GoodmanSource: Modern Retail ↗
Edgar's SEC data profile {actuarial version}
In plain words

Mine your order history for products customers buy elsewhere within 30 days, then source a house version to capture the leak.

$400 million
adjacent product its existing customers were already buying elsewhere
500 orders
and cross-reference customer emails against their social media or…
30 days
of ordering from you
60 days
If it converts above

ThirdLove launched nipple covers in early 2025, according to Modern Retail, marking a calculated white-space move inside the intimates category. The brand — known for bras and underwear — identified a $400 million adjacent product its existing customers were already buying elsewhere, then built its own version to capture that spend.

The mechanics: ThirdLove analyzed purchase behavior and discovered customers routinely bought nipple covers from other retailers in the same shopping sessions where they ordered ThirdLove bras. The brand flagged this as category leakage — revenue walking out the door to competitors — and developed a house version to keep the transaction inside its ecosystem. The product launched with minimal fanfare, seeded into the existing catalog alongside core SKUs.

Why it worked: ThirdLove did not guess at demand. It measured actual buying patterns from its own customer files and confirmed the white space with data before committing to inventory. This approach de-risks expansion. When a brand already owns the customer relationship and sees documented cross-shopping for a complementary product, the launch becomes a retention play, not an acquisition gamble. The brand converts a leak into a line extension. Nipple covers are low-SKU-count, low-inventory-risk, and solve a problem the customer already admits by shopping elsewhere. ThirdLove captured wallet share it was losing by default.

The broader mechanism is category mapping inside your own order history. Most physical-product brands leave money on the table because they do not audit what their customers buy immediately before or after placing an order. ThirdLove identified a product customers needed in the same usage context — getting dressed, managing fit under clothing — and closed the gap. The white space was not hypothetical. It showed up in browsing and purchase data.

The steal for a small brand: Pull your last 500 orders and cross-reference customer emails against their social media or purchase histories if you have access through Shopify or your ESP. Look for patterns in what they buy around the same time from other brands. If you sell coffee, check whether they are ordering grinders or pour-over kits elsewhere. If you sell skincare, see if they mention sunscreen or makeup removers you do not carry. Identify the top three adjacent products your customers buy within 30 days of ordering from you. Pick the one with the lowest SKU complexity and the smallest MOQ, then source a private-label or white-label version. Launch it as a quiet catalog addition, not a campaign. Seed it into post-purchase emails and product pages as a "you might also need" upsell. Track attach rate for 60 days. If it converts above 8%, expand the buy and promote harder. If it does not, you learned the gap was not as wide as the data suggested, and you exit without burning the budget.

ThirdLove did not invent a new category. It filled a gap customers already validated with their wallets. The play is not creativity. It is observation, then execution on a need your own buyers are already solving somewhere else.

Steal this — share it
Branded by POPS4 · proof in 60 seconds
For the principal

Pull your last 500 orders and cross-check customer social mentions for adjacent products they buy elsewhere in the same usage context.

For the operator

Audit your CRM for purchase patterns 30 days before and after order placement, then source low-MOQ versions of the top three leaks.

For the house

Request purchase history from your brand partners and flag adjacent categories where their customers cross-shop — potential for exclusive bundled SKUs.

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Sources and method
  • Primary report: Modern Retail, June 11, 2026.
  • Written with artificial intelligence from public sources and published without individual human review. Corrections: jenny@pops4.com.
category expansionwhite spaceintimatesprivate labelretention playwallet share

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