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 Re-Brewing Your Grounds A Second Time Roasts & Grind Recommendations? How Does Brewing In The Refrigerator Slow Extraction? Extract Chamber Overflows After Flipping It Over? How Much Coffee Extract Does The BOD™ Make?