Instead of plain old coffee, I sometimes like to get my daily caffeine ration from other drinks, e.g. fruit juice. For this purpose I have bought some pure caffeine, which takes the form of white powder.
Now I'd like to take some of that on a journey where I go by plane. I don't want to take the big glass jar of caffeine with me, so the best thing I found is a small transparent bag. It looks somewhat like this.
Now I assume this must look pretty suspicious, so I was wondering if your average European airport has the means to identify this as something harmless quickly or if I could expect hours of trouble if this bag were be detected.