Originally Posted by
AnalogMan
Is the cargo hold pressurized to the same level as the cabin? I have had bottles of cologne leak substantially in checked luggage and I theorized that it was because the cargo hold was not pressurized (or to the same level as the cabin).
When I put cologne in my carry on luggage, I have no leakage issues.
It also depends on how well the bottle is sealed (ie leak proof rubber seal cap) as well as how well the bottle can handle pressure.