Till, is your concern traveling lighter or not having to hassle with a 311 bag at the security check? If the latter, this definitely falls under a YMMV warning… I have been traveling with a small 311 bag (shave oil, toothpaste, and hair gel), but have not been removing it from my suit case (a 15 year old Tumi 2-Zip soft side shoulder bag). I keep it in the outside pocket. In over 30 trips I’ve taken in the last year or so not removing it, I’ve not once been asked to take it out and rescan.