As many people have experienced, soy milk will often curdle in hot coffee. I've experienced this myself with both instant and fresh coffee, and with my homemade soy milk (not my favorite soy milk ...
Typically, the standard advice for prolonging your coffee is to store it in an air-tight, light-tight, dry container. At a chemical level, what happens when coffee is left in humid or sunny conditions ...
One sign of really good fresh well-roasted coffee beans is foam. When you pour hot water into the French press, it foams, often forming a head up to 2" high. And when you use an espresso machine, ...