If you are going for just dilution, Id imagine most any liquid will work in diluting the sample down.

As far as the tea actually cleaning out your system, no. Doesnt quite work that way. In fact, I would wager considering what anti-oxidants do in your system, that you would in fact be hindering your progress in removing the toxins, as the anti-oxidants actually help prevent the oxidation of cells, and are used to help prevent fat from decomposing in meat and other foods.

Id stick with tried and true methods.. true be told, there really is no easy way to detox your body of chemical that is used to detect pot use. If there was some easy way to do it, everyone would know about it, and everyone would be able to pass no problem. Id recommend Quick Fix, or if thats not an option, I suppose you can try dilution, although its not as sure of a method, by far.

Im sure FBR can let you in on more about the anti-oxidants, thats just what I remember from my science classes back in college.