Tehy won't let u on with liquid not even the water they sell 15 feet from the gate. Atleast not any int flight I have been on. I brought on powders and ostrich sticks and haven't hadd a problem. I acutally last year had brought about 60 protein packs and 70 ostrich sticks, one whole suitcase was filled with it plus what I took on the plane.
oh ok i was thinking of the RTDs that were already liquid. If its just powder you should be fine. Like i said i brought a ton cuz i was going to be there for a month and when they screened my stuff they didnt even bat an eye.
I too have taken True Protein RTD's all over the world. Long-haul flights like Newark-Delhi, Atlanta-Dubai, Atlanta-Moscow, Chicago-Beijing and not once did I ever have a problem using them or with customs/immigration officials.
Only time I ever did have a problem was on a lousy little Continental flight from Houston to Fort Lauderdale where the bitch male flight attendant claimed they did not have enough bottled water on board to fill the tiny plastic bottle with a few ounces of H2O!