Is it possible for essential oils to leak from sealed bottles that are being transported by airplane in the cargo hold?
Oils absolutely leak out. (I found this link searching for solution) They leak out in the cabin (sometimes even during delivery, with the seal on) I always carry my "first aid kit oil set" with me, and every time some leaks out in the cabin luggage.
The worse experience: I took a few bottles up on a hike in Peru (up to 5200 altitude) They were all empty when I tried using them. I believe that the pressure pushes out the oil through the plastic (the small hole) and the black top doesn't seal enough to stop the liquid from coming out.
Can anybody advise me, how I could store my oils when I travel, please. I tried putting plastic under the black screw top. It may help a bit, but doesn't solve the problem. Thanks
Definitely possible, air pressure varies with altitude. Air pressure at sea level (approximate pressure at which the bottles were sealed) is higher than the cabin pressure of a plane (correct me if I'm wrong but commercial cabin pressure is normally somewhere in the region of air pressure at 6,000ft, when flying at 36,000ft) so there will be a pressure differential that could cause the seal to fail, and the contents to leak out in order to equalise the pressure difference. If the bottles are upright the air should escape before the oil though!