How Long Will My Coffee Extract Last In The Fridge? For optimal flavor and freshness, you can store your cold brew coffee extract for up to 2 weeks in the refrigerator. Related articles Roasts & Grind Recommendations? Re-Brewing Your Grounds A Second Time Extract Chamber Overflows After Flipping It Over? How Does Brewing In The Refrigerator Slow Extraction? How Strong Is BodyBrew Coffee?