The tea I'm drinking have 72mg of antioxidants per240mL.

Which would lower the THC metobolite concentration.
The metabolite concentration is lowered because the tea, being a liquid, is serving as a diluting agent to the concentration thats present in the bodys excretory system. The tea has no effect in removing THC metabolites from fat cells. There is NO product of any kind that removes THC from body fat. Only physical activity can do that. Time is also a major player, but bear in mind that the time factor is influenced by the degree of physical activity.

Drinking liquids of any sort days before the test does nothing. THC is stored away in your fat cells and slowly released into the bloodsteam, to make an eventual exit from the body via the excretory system. You are not pushing anything out when you ingest liquids days prior to your test, other than the first few voids when you eliminate most of the metabolites that have built up in the excretory system.
To put it more simply, when you are drinking fluids, you are aiming to get the mass of THC metabolites present in a given volume of urine under the cutoff level of the test you are taking. When you drink a large amount of fluids, your body is still releasing THC metabolites at a constant rate.

Now time for an analogy:
You are mixing Kool-Aid, and instead of using 2 quarts of water you use 20. Now go and measure the mass of Kool-Aid particles per glass of Kool-Aid (how watered down does it taste?). You can probably barely taste the Kool-Aid.

Kool-Aid mix = the THC metabolites
your taste buds = the EMIT screening reagent (drug test)

You cant taste it, you might as well say its not Kool-Aid.

The EMIT screening reagent doesnt react to its calibrated cutoff level, it simply says the sample contains no THC.

Same principle with your body and drug tests.