I haven't had great luck with boxed wines (tetra packs) the flavour IMO just isn't that great. You could try the suggestions above posted by PPs. Another possible is to wrap your 2 or 3 bottles in bubble wrap and then place securely in dry bags within your checked luggage. You can get these at most outdoor shops like REI, etc. However, for the extra expense and time involved in doing this, I would check out the resort shop, the France shop in Epcot and if you are going during Food & Wine, the Festival Center has a great selection. As PP noted, if purchased in the park, they take them to the front of the park where you then line up with your receipt to pick up at the end of the day. Are you paying a premium for bottled wine in the park? Absolutely. But if you add up the $ with the prep packing, it may be a wash and you save the worry (and weight) of glass bottles in your suit case.