I havn't been able to find a caffeine only supplement anywhere. I would rather buy from a store than order online. The only things I find that contain any amounts of caffeine are fat burners such as http://www.walmart.com/ip/Green-Tea-Fat-Burner-Dietary-Supplement-90-Ct/10449752#SpecificationsWould something like this be suitable? I will be trying to drink coffee throughout the day so perhaps i don't even need a caffeine supplement?