This year, entertainment and hospitality hub Britomart will be home to the third of the growing chain that Ms Martinescu hopes will soon become nationwide. The new kiosk will be on Scene Lane near Countdown Auckland City.
"It's been an incredible year. I have had a lot of requests to open something up and down the country.
"The results have just been overwhelming, there's obviously a need for what we have been doing in the market."
The $2.50 venture - which doesn't charge extra for soy milk or flavour syrups and also stocks baked goods for the same price - created public debate about how much consumers should be forking out for coffee.
"Sometimes it is portrayed as if we are at war with the cafes and coffee industry, but it's not quite like that - everyone has unique points of difference and our focus has been on takeaway only.
"If someone wants to sit down and have a meeting they won't come to us. But if you want to have a good, affordable coffee, they come to us."
The model was also criticised as being unsustainable, but Ms Martinescu said she has proved that wrong, too.
"It's coming up to a year down the track now and we have three branches. If it wasn't sustainable we wouldn't be where we are and as sustainable as we are.
"We are just starting to scratch the surface, particularly with looking at different centres where it could expand."