There is a blue lantern kind of thing in my back yard.  It has been there for several years and I can only guess at how it got there.  I can only guess at what it is; hence I call it a lantern thing.  It looks like a blue glass cylinder with large brass fittings on either end.  It may be a humming bird feeder or some such.  I have never looked at it closely and have no idea if it contains anything.  I may have even stepped over it without picking it up to look at it more closely.