How much caffeine in decaffeinated tea?

Nearly all the caffeine comes out in the first 30 seconds of the first steeping.

As for whether there's more than 5mg, *shrug*.

In fact, one can almost decaffeinate one's own loose leaf tea by steeping for 30 seconds, then discarding that steep, and then steeping normally.

Part of the "buzz" might come from multiple cups.

I think you're still a caffeine hound and that's why you are keeping that decaf tea bag going even through a second cup. ;-)

Still, I kind of doubt you are getting a buzz from the caffeine. Do you get a buzz from a 12 oz. cola (30-35 mg caffeine)?

Since most of the caffeine is gone in 30 seconds (as already mentioned here), I don't think you're getting much more by steeping the bag continuosly. Over steeping causes bitterness not elevated caffeine.

Now, maybe if you put 6 or 7 of those bags into 6 oz of water, I might believe you're getting a caffeine buzz. ;-)

See the DIY decaf method in the tea FAQ -

For the answer to this question, you'll have to do the math: Multiply 5mg by the number of teabags you're using.

I wasn't going to say anything but...Reusing teabags? Eeewwwww! Are you aware that the smaller particles (dust, fannings) used in teabags release their flavor much faster than broken or whole leaves and you're not gaining decent, appreciable flavor when you reuse a teabag?

Of course, if you're doing it for the color... .