My wife's Uncle is a car guy and every year for Christmas tries to find something unusual and antique vehicle related to give me as a gift. He handed me my present one year and after a short story about dumpster diving at a neighbor house came up with it. It was round and in fancy Christmas paper and he so proudly said, "see if you can guess what this is". Without missing a beat I said, "its an old road flare!" He, my in-laws and wife were blown away.
I would love to have a few more. One year I put citronella oil in it and used it on the picnic table! It worked great!