A friend of mine from my days living in Honolulu had a bottle collection of old bottles of all types and Chinese opium pipes (looked like little ceramic flasks of different shapes) that he collected from building sites in the old part of town. Once he got to know some of the contractors, they would call him when they were digging foundations and he would find the bottles pretty far down in what were old dump sites for trash along the waterfront and in Chinatown. I think most of the bottles and pipes dated from the late 1800's to early 1900's.
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Don't get me started, you know how I get.