What is the best way to store my drip coffee?

Firstly, and most importantly, always reseal your pouch firmly! Air going in and out of the packet is a big no-no. This will cause your coffee too lose its great taste very quickly. If you store it in the fridge (which you can) and it is not sealed firmly, it could absorb the taste of the different open foods in the fridge. In general: a cool (about 18 degrees), dry place, will do. Make sure it is sealed airtight!