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I use a 7 1/2 gallon bucket with lid that hydraulic fluid comes in. I get them from work, but most oil places will give you a used 5 gallon bucket/lid for free. I have 6 buckets, and when they all get filled, I take them (and my filters) to the recycler for a whopping $0.16 / gallon.
Tennessee has a requirement that all auto stores, and service places take as much oil as the public can recycle. I take mine to the dump, they have a barrel.
I have a local guy that uses it to heat his work shop. He comes and picks it up and supplies me with a barrell to put it in. That saves him money on heating fuel and me time and money disposing of it.
I guess a guy could put in a heater and heat his own work shop.