Maybe some mylar bags.
I purchased a bunch of vanilla while traveling, some years back, and had several bottles in my checked baggage. Upon retrieving from the luggage claim, my bag flew open and threw clothing and bottles of vanilla all over the terminal. Several of the glass bottle broke and soaked into my clothing, which was all over the terminal. After picking out glass from my underwear on the terminal floor, I decided that I would not travel with glass again. This was all thanks to a careless agent stateside leaving my bag unzipped and sending it out.