The FDA doesn't require them to
list caffeine content on labels so you might not know exactly how much caffeine you get.
This article
lists the caffeine content in different coffee...
Not exact matches
Green tea has decent thermogenic effects due to its
caffeine content, so you'll find it
listed on most products.
Apart from the fact that it's made from beans, and beans are on the banned
list, Cordain frowns on the
caffeine content.