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There doesn't seem to be common to keep a fly collection in alcohol. Is there someone who does this and can tell us a bit about the equipment and best practices? I wonder what container is used for this. The reason I ask is I got a few nice small plastic micro tubes (2ml) from a collector to send beetles by mail (but not in alcohol). Not sure what it is named in english (in swedish mikror?r/kryor?r). I suspect that insects kept in alcohol is stored in small glass tubes and not plastic ones!?

I'm also interested in how storing other insects in alcohol is done.