Just saw this on a morning show and thought it was awesome for shipping beer. http://www.wineskinoffer.com 10 skins for $15.95
That is a great deal, I find the regular pricing to be way too high to justify. But I just ordered 2 sets for my family vacation in February.
i think they were meant for the bottom seals so if it does break it wont spill. and im hoping reusable.
Haven't used the wine skins but the wine mummy is similar, seals well and is re-usable. Think big ziploc bag but made of bubble wrap. There are other variants that use fabric between the layers to soak up any spills.