Festive Bat could be unboxed from a now retired Naughty Winter Crate Series #35, from a December 9th 2011 patch. The Festive Bat had the lowest odd of being unboxed (~0.99%) and it was a guaranteed Strange quality.

Judging by the owners, and the fact that all of them are non-tradable and non-craftable, the Unique quality Festive Bat was only granted to Valve employees.

There are 105 Unique Festive Bats.