This email's just gone round the lab:
Once again, due to our unrivalled ability to breed healthy insects, we have a surplus of Giant Spiny Stick Insects (Eurycantha calcarata). These are currently at the "teenager" stage, so are a perfect size to sneak into the house without frightening your partner/children/parents.
If you are lacking ideas for a Christmas present, how about a nice new pet?! :-)"
If anyone wants one let me know and I'll get it for you. Just remember folks, a stick insect is for life, not just for Christmas.