The downloadable PDF edition of Truth or Drink contains all the game content and is available for $7.
It can be printed out at home (or work, if possible):
And then it's up to you to cut it up into actual cards:
We try and make it easy for you by including guides and templates for cutting.
The download includes versions sized for US letter paper (8.5 x 11") and for A4 paper.
It also includes the pattern for the backs of the cards (in case you want to print them double-sided).
As far as we are concerned, the green backs are specifically for the With a Twist deck, and the black backs are used for all 4 question decks (no distinction).