Bialetti Cold Brew Coffee Maker – Taste the Difference! Chances are that you’ve drank an acidic, bitter cup of coffee at least once in your life, and we’re willing to bet that it wasn’t the best tasting coffee you’ve ever had. Not many people enjoy an acidic, bitter cup of coffee in the morning, which is why our Bialetti Cold Brew Coffee Maker evenly steeps your coffee for a smooth, well-balanced and flavorful taste that’s 65% less acidic than traditional, hot coffee.