Hey, question to anyone who knows roasting:

I'm helping to reorganize/improve the logistics of our roasting works.  We are considering transferring our green coffee to some kind of smaller (40-50lb) container, which we'll also use for roasted storage prior to bagging the beans.

Anyone have any suggestions?  Have been browsing the Wide World of Containers, ideally looking for something that is:

• food safe
• sturdy
• easy to carry & stack
• airtight would be cool
• in a price range that won't kill us to get 100 or so

Any suggestions would be greatly appreciated, thanks.