Mountain Hiking with a bottle (or two) of Champagne

[Jackie]

Don't think the frozen towel would do much. The BottleGuard or something similar meant for air travel or air transport is a good idea.

I've used JetBag myself (available on Amazon). There are many brands... WineVinci, WineSkin... All they really do is absorb the wine in case the bottle breaks or the cork pops. You should be ok as long as the pressure is not to great, so minimal shaking etc.

It will be interesting to see how it goes! Can you let us know? Good luck and CHEERS!