Have travelled multiple times with a Mighty vape, grinder and the canister with the loading capsules. Cleaned beforehand with 99% alcohol and the plastic bits and grinder went through a dishwasher cycle. Finally vacuumed it all into a vac bag and have never had issues, especially going to places with ""legal" weed, such as Spain. It's probably famous last words but those Customs seem to have much bigger fish to fry than UK leisure smokers. Also, if it suits, for checked baggage look into a service like Airportr ; they collect your bags from home, they clear UK customs within a few hours and are ready and waiting at your destination once you have landed, way beyond the customs area. In fact, the old school customs area of tables and officers seem to be a thing of the past - you just walk through into the baggage collect. Assume they monitor from cameras and two -way glass, although not so as you would notice. Z