I have a load of family "heirlooms" in my grenier. I'd like to send these to my children - daughter in the US, son in Sweden. The parcels will probably be heavy (15-20Kg?) and big (1M x 0.5M x 0.5M?). First question is, who could ship them economically? I'm guessing that the likes of UPS would be VERY expensive. There's no urgency. Second question is, what to use as containers? I'm thinking along the lines of cardboard boxes, lots of bubblewrap inside, lots of gaffer tape outside. However these, while strong, would not necessarily be rigid. Maybe big plastic storage chests would be better? Any advice will be very welcome. Cheers