One of the great tips is to jam the base of each (wrapped) bottle into a shoe, so it effectively “stands” towards the base of the suitcase. The shoe’s sole and spongy inner absorbs any impact on the base of the case. See:

Is there some shortage of corkscrews? Why are people even embarking upon the idea of a bottle of wine without the key implement required? Perhaps there are articles on how to jump from a plane without a parachute, or how to cut a sausage without a knife – or perhaps those people just choose to do something else, for…

Last time we visited, there wasn’t a somm to impress at our local bottle shop...