They ship USPS and my mail carrier brought one per day for three days. They are somewhat bulky but smaller than 55 gallon drums of course. They were in excellent condition. The handles are tougher than they look in the pictures and the lids clamp tight on an o-ring. They certainly appear to be air tight. Only problem I have is finding room for them.
They stack well too.
I wasn't quite ready for bulk grain, and I'm still not, but I bought them because I was afraid they might not be available later. It looks like I was right.