Yup! They roll!
Tube in a box, triangle best, square second best.
Ship in a case some say? Maybe. But a really sturdy case has value too, and just adds to the insured value and hence potential cost and risk. I wouldn't trust many (most?) cheap cases, I think I can pack a cue much safer. Those cases that are just a PVC tube with vinyl covering are fine, but that's because they are a PVC tube. You still need to pack the cue in it better than the cheap lining can do.
Aside from delivering the cue yourself, best/fastest shipping available would be the rule. Generally Fedex or UPS. USPS is just getting worse all the time. I got a really nicely packaged cue from Japan by DHL really fast. I was impressed. I was worried but it turned out great. There is one now advertised in Japan to ship to the US that has ivory inlays and ferrules, I wouldn't try that.
With all that said, I have a few cues that need sent out for work and the only reason they have sat here for years is my shipping fears. I have made all kinds of excuses for myself, but that is what it comes down to.
Insurance can make you whole financially, but it can't replace the irreplaceable.