Tazo Zen Green Tea was my go-to Green Tea for many years. Its available at Starbucks and Target, so it was always there when I needed Green Tea on the go. It contains around 30-45 mg of caffeine, which is a little 'pick me up', but not nearly as high of a caffeine content as coffee. My one complaint is that I think this tea scorches and turns bitter a little more easily than other brands I've bought. You have to make sure that baristas know not to put it in BOILING water and you have to be ready to pull the tea bag out of your cup when it has steeped the right amount. That being said, it is still a great good tea.