Use “tubes.” Some articles of clothing have a tube shape and may help protect against impact. Place your bottle within socks, shirt or sweater sleeves, or pant legs. The more layers the better. Best examples: “Hoodie” style pullovers, denim jean pants, calf-height gym socks.
Always travel with couple of kitchen-sized garbage bags. After inserting your bottle within your clothing “tubes”, insert inside the garbage bag and wrap excess bag over itself.
Use Neoprene totes. These can offer modest impact protection, and will offer some thermal protection to help prevent your wine from being baked in case your luggage is left in the sun for a period of time traveling in hot climates. Best technique involves putting one tote over each end, and then wrapping in a plastic garbage bag.
Avoid bubble wrap. Have you ever ordered wine and it has arrived shipped in bubble wrap? There is a reason for this—it doesn’t work for wine bottles. Early experiments in impact protection for my product verified this. You are better off wrapping in clothing (and it’s better for the environment!)
Always pack the bottle in the very middle of the luggage, never in contact with any side of the luggage or any hard personal object, with as much clothing around it as possible.
Protect your electronics in the same bag by packing them away from the bottle and wrap them inside a plastic ziplock or garbage bag.
Add a note for the TSA. Keep it short and sweet. Handwritten and signed adds a personal touch that is difficult to ignore. Seen on the left is the one I (Brian Hart) used (before Vinarmour), on heavy stock paper so I could reuse.