Not that I ever check luggage anymore, but if I did, and if I happened to be visiting wine country, and if I discovered an amazing bottle of wine, and if I purchased one or two extras to bring home so I could relive the deliciousness, I would totally invest in a few WineSkins. These plastic, bottle-shaped envelopes protect your wine (and everything else in your bag), first with cushiony bubble wrap and then with two separate seals. (You can also stuff them with glass bottles of olive oil, vinegar or anything else.) Although not reusable, they’re super cheap: just $10 for three. Find where to buy near you—and get packing!