Last month I brought a case of local Washington State sparkling and dessert wines back from Seattle. I use the carry handle cardboard case I got in the winery and just stuffed my dirty underwear around the bottles, and made sure the box wa dead in the middle of my case with laundry underneath and above it. It made it fine.

When I unpacked, my suitcase was a bit neater than I remembered, but still padded well. Inside the case of wine as the usual note from the TSA saying that they had inectwd my bag. They are obviously far more conscientious and neater packers than I am.