NEW YORK (AP) — Starbucks has signed a new five-year contract that triples the number of branded single-serve packs it makes for Green Mountain’s Keurig brewing machines.

The deal comes after Starbucks last year introduced its own single-serve brewing machine, which was seen by many as posing a threat to Green Mountain’s popular machines. Green Mountain, based in Waterbury, Vt., was a pioneer of single-serve coffee in the U.S. with its Keurig machines and coffee pods. But the company has since faced challenges with the patent on the technology for its K-Cups expiring and competitors rolling out their own products.