I have often used the tubes (both PVC and cardboard carpet rolls) because they are easy to find. When I'm not feeling quite so lazy, I like the idea described above by Jon Stewart. Takes a little more time, but I do believe they are easier for the post office to handle and somewhat lighter - therefore cheaper. And, although I've used rolled up bubble pack to surround the bow and make the package less likely to crush, his idea of making a "french fitted" box of hard foam really sounds like the ultimate shipping package.