Ah... Yeah I see what you mean. I was kinda concetrated on the space part of tranportation process, but we also need to somehow get those things to the surface without getting them burned in the atmosphere. Got it. Still... сylindrical shape gives maximum of inner space per minimum material. So it's cheapest, most effective and rationale way when it comes to spaceships (though they look a little boring). But studying the crate form, I realised that they may be stacked into a cylinder (Like pieces of cake! Literally). So it looks like a cargo shuttle (or, more likely, a cargo rocket) has a huge culindrical cargo bay, in wich crates are located with their more sharpy sides facing the center (Again, like pieces of cake). Thought this thing would be big... like bigger then that transport.But... maybe the planet of destination has low g. Or I'm just getting it all wrong.