The really strange part would be this........nic is a liquid, so what "drug" would they think it was. Well the only liquid drug i can think of would be .... so your carrying around a bottle of nic right even a small bottle, say 30ml. Do you even have a clue how much of a supply of ... 30ml would be LOL
WOW a cop would have to be off his rocker to mistake the two. However that being said i have gotten strange looks when i would vape. Guess they think its some kind of drug pipe. Honestly the only think that would be a issue would be a syringe, lot of people dont know that your suppose to have a script to get those.
Even still they would test it and see there was not drugs in it. I think a box of diy would be pretty safe, does not mean they wont ask you about it though.