[maggief]

Remember the milk in the glass magic trick? If you do then you have your answer.

Can't the same thing be done with baby formula in a bottle?

[Post-Neolithic]

"Can't the same thing be done with baby formula in a bottle?"

Yes, and any other liquid. Which makes the "Taste before you board" idea typical of the know nothings at the TSA.

[IamConservative]

Can't the same thing be done with baby formula in a bottle?

Sure. Put two liners in the bottle. Bad stuff on the outside layer, milk on the inside layer.

Intersting about the disposable camera as well. You could open one of those and put about anything non-metal in there, glue it back up and the the flash would still work.