They've recently achieved both Climate Positive and B Corp accreditation, and from March this year Hello Cups have been sold nationwide in all Countdown supermarkets.
The number of Hello Cups sold to date have saved 200 million single-use period products from landfills and waterways around the world.
"Sometimes starting a business is all about just jumping in," McLean said.
"We're looking forward to sharing more about how we built our business from scratch, the mistakes we've made and our plans to be a global leader in sustainable period products."
The two women will be speaking at the series on June 16 at the Napier War Memorial Centre.
Tickets are $30 and be purchased on the napier.govt.nz website by searching keyword #businessbreakfast.