These can be awful too folks. If you're going to pack a cooler for some reason, make it one of those thick plastic ones, for the love of all things, no styrofoam. People pack those things with lbs and lbs of fish and they break if you even look at them wrong. Doesn't help that the baggage belts are made to be kinda sticky, and sytrofoam doesn't slide at all.

As far as the wine packs go, since I saw someone mention them above. Honestly, these are risky at best. Even fragile tagged and listed as WINE on them (make sure the box says what it is) inside that box is still usually just a bunch of glass bottles with little cardboard dividers. I don't have a great suggestion for wine. Personally whenever I transport liquor it's never more than 1-2 bottles and I just wrap them in shirts and use socks/underwear as padding all the way around the suitcase.