If you are speaking about the TJ border, read my previous post.
If you (any of you) are referring to the airport metal detector...why in the hell would you want to try that?
On the other hand, I have had aluminum topped multi-dose vials (even as large as 50 ml.) in my carry on bag and have put it through the airport x-ray...without a problem...on several occasions (even recently).
Just don't have any syringes with needles in your bags that will go through the x-ray machine (duh).
I never thought of that, since the club I work doesn't use metal detectors at the door - we just dress-code the gangsta punks and tell 'em to beat it... makes for some serious fireworks sometimes, but we like to keep our clientele what it is
-M