Hey Harry!
Any glass vial with Gold in it will break (Duuhhh!). Thin Glass and very dense (heavy) Gold just don't play well together.
Years ago (after I swept the warehouse floor and re-panned all that) I decided to change my ways of doing things. I prefer to carry my Gold in (usually) water - and so I took an empty plastic pill bottle and put the vial inside that "containment". Works really well for me since occasionally there is the
OMG! thing.
For those of us in colder climates storing Gold in water will, eventually, result in the water freezing, the glass vial shattering, and when warmer temperatures come along - Gold everywhere. A pill bottle containment also works there --- but --- simply changing the water to rubbing alcohol makes for a great anti-freeze answer.
All the best!
- Joe-