I have skimmed with some interest the discussions about containers as loads for rolling stock. I was then a bit taken aback by the prices Asked for some of the container packs... maybe I am not being realistic but $60-70 for a three pack of O scale containers? Wow.
With some digging I was able to find a Chinese die cast toy company that has 1:50 scale plastic 20 foot containers and die-cast metal yard equipment such as stackers. I think they are intended to be used on a radio control container vessel (ship) that the company sells but am not sure.
The 20 foot containers are priced at less than $8 each with free shipping to USA (note that various vendors on the Amazon-like site have various prices). The stackers are $14.20 (best price) with about $9 shipping. I ordered 4 of the containers just to try them out. Hopefully they will look good as a load on a 15" flatcar.
Unfortunately on the ordering page they don't have dimensions that I can see. I assume that they are just a touch smaller than actual O scale. The rear doors do open and they are available in various colors. Hopefully these containers will be good for my purposes- the containers don't have to be dead on authentic, just close (colorful too...).
When I receive them I'll post some photos and give my impressions if anyone is interested.