Did you know that caffeine bonds naturally to peanut butter? Neither did I. But apparently it does, and when you ingest it as a solid food like peanut butter, it's absorbed more slowly and gradually than drinking it. This means that the effects of caffeine will be more consistent energy release.
This is why STEEM, the caffeinated peanut butter is an interesting product. It's a natural peanut butter, and comes with the same amount of caffeine as two cups of coffee. Currently the price is $5.99/8 oz jar.