the gift of an Engineering mount or pet
I'm curious as well.
According to this http://us.battle.net/wow/en/blog/7305441
"The Blingtron 4000 will be fully stocked with a variety of fun items such as Party Grenades, but even better than that,wow gold it has a chance (a very, very small one) to give the gift of an Engineering mount or pet."
Does that include the Depleted-Kyparium Rocket and Geosynchronous World Spinner
You are perceptive. There is a very small non-zero chance for a mount or pet from the Blingtron 4000 Gift Package. We heard you like bling so your pal Blingtron may be getting some minor upgrades to their bling in an upcoming patch.
With plenty of bling to go around, share the happiness. {◕ ◡ ◕}
