^This is a good point, I had liquid in both of my clearo's, both leaked a couple drops into the mouthpiece. I flew into Philadelphia through Detroit from Grand Rapids Last week Wednesday. I was super nervous going through security, had my ego in the box I bought it in with the clearos attached and 2 18mL bottles of liquid in a separate baggy that I laid out in the tub with my shoes and stuff. Lady asked if that was it, told her yes and went the rest of the way through security without and issue, officers never even batted an eye at me after that. I'll see what the people at PHL do next week Monday when I go to fly back.
You shouldn't have any problem going through PHL. About a week and a half ago I flew from PHL to Minnesota and had no problem going through security.
Like someone said, large airports have probably seen all this many times.