My absolute favorite part of Fed Ex envelopes, is where they say "Do not ship liquids, blood, or diagnostics in this packaging." Oh, no! What am I going to do now? Actually, that's really rather gruesome. Imagine a Fed Ex package being delivered to you and you open it up and it contains blood! Or some other unmentionable liquid. Do they have a special package specifically designed for shipping blood/bodily fluids? If so, my office doesn't have any.