I was in the corrugated packaging business, making cardboard boxes, for 41 years. The triangle boxes you get at the post office should not be used to ship high value items with any weight to them. Corrugated board is incredibly strong when designed correctly. For shipping bows, rectangular, shallow, multiwall design boxes are best or as many have mentioned ship them in PCV tubes or the carpet tube ..... do not ship them in singlewall triangle boxes from the post office or you will most likely be disappointed. I always wrap all the pieces of a bow before packing it into a box or tube with bubble wrap, newspaper, or something cushioning for added protection and I do not spare the tape. Good luck to all .....