My question can't be answered (to my knowledge and ability) on search engines that I have explored: How much caffeine in a TEA BAG not steeped in liquid but simply CONSUMED as is , the contents chugged with a glass of water? What would the half-life of this dose be?
I don't have a number from a manufacturer, but one of my favorite tea makers (Numi Organic Tea) advises that soaking their tea in hot water for less than a minute and discarding prior to brewing removes most of the caffeine content.
So eating the bag should get you about the same as drinking it.
Not sure why you'd want to eat tea. The benefits are extracted by hot water in the brewing process. Plus, the tea in the pre-bagged teas are usually pretty cruddy quality tea "dust" vs the real leaf tea from the tea shops.
Get a high quality loose-leaf tea and one of these: http://www.amazon.com/s?ie=UTF8&index=blended&field-keywords=inginuitea You'll never look back!