We like coffee and we like caffeine. We also like things that are easy. The Cold Brew Coffee Infusion Bottle combines all our likes into one awesome glass bottle. The finished product is sweet and delicious. It has 65% less acidity than a hot brewed cup of coffee and is a rich, highly caffeinated concentrate. Here's how you make coffee with the Cold Brew Coffee Infusion Bottle: Fill the extra-fine, stainless steel coffee filter with 4 tablespoons of coffee. Fill the water 1.