The outside of most commercial coffee brewers are stainless steel, but I wouldn't be surprised if the container for the liquid is Aluminum.
Aluminum, for over 10 years now, has been thought to lead to Alzheimer's.
One thing I've noticed is that restaurants are starting to move to a pre-brewed, super-concentrated, liquid coffee that is mixed with hot water when it's dispensed. Think "soda fountain" only "hot coffee", and you'll get the idea.
Peace, Love, and Vegetable Rights!
Eat Meat and Save the Plants!