If you use a drip coffee maker, then you are familiar with coffee filters. Paper filters are pretty standard, but they're not your only option. Different kinds of reusable filters are better for the environment, and do not effect the taste of your coffee as much.
Yes, coffee filters made with real gold. These high-quality filters are lined with 23karat gold and will not give any odd flavours to your coffee. Not cheap, but they will last you a very long time.
These are great, and environmentally friendly. You can get filters in the same size as the paper ones, but made in with unbleached cotton. You can just rinse them out between uses.