Hi,
There is another long thread here with a lot of information about this.
To your specific case:
-if you must use glass, I would look only for borosilicate/pyrex type only, it has a lower coefficient of thermal expansion and is more resistant to thermal stress. Even with this type of glass, there will be considerable stress since lower part of container will be at vapor temperature and upper part will be much cooler. My initial tests were with a small borosilicate glass cooking container and it went ok. I used 20ml of galden.
-galden vapors are heavier than air, they will stay low and they will not escape from container unless there is too much galden inside. You can calculate how much liquid to use, so the resulted vapors do not have a volume higher than container volume.
-when selecting a heater, if you put it inside the container, make sure no part of it (which touches galden) exceeds 300 degrees celsius. Above that galden decomposes in some nasty/toxic products.