While I was in Willamette Valley this week, I stopped in to the Carlton Winemaker's Studio to see what producers they were featuring, and on my way out, Wine Skins caught my eye and I had to buy 5 of them. (US $10) These clever packages are leak-proof bubblewrap bottle envelopes for putting wine in your suitcase. I had a bunch of wine to bring home, and tried it out.
There is basically an inner bag of bubble wrap, and then 2 different seal points, one on the inside, then another when you close the end flap. None of my wine bottles were broken in transit, so I can't attest as to they're being perfectly leak-proof, but these are well made and would make an excellent gift for any wine lover that travels. Recommended.