https://www.youtube.com/watch?v=cEgBHqzkEoM
Although it is more a proof-of-concept design than an actual mission hardware, European Space Agency made this fully functional spherical container which has already undergone testing in simulated thermal conditions, including a 400 g shock test.
https://gizmodo.com/this-metallic-sphere-will-some-day-carry-martian-sample-1453992197
