Yes, this is what I always tell people. I know people who swig mountain dew or dr pepper all day because they need them to concentrate or stay awake. Skip all the excess garbage that is in coffee and soda. Get a caffeine supplement that comes with l-theanine, it is thought to smooth out the effects of caffeine and help avoid the "crash" when it wears off.

Not to mention it's like five cents for the same amount of caffeine in a $5 coffee.