I have trouble with severe GERD/hiatel hernia and cannot always tolerate two cups, which really should be the cutoff. Spiking it with expresso is my way to go. Jolt offers gum and also a newly launched mint (www.joltgun.com, products section) that are easy on my stomach and give me a slight buzz. They exaggerate when they claim 5 mints to the cup, though. klang