What?!?!?! You haven't bought my Christmas gift yet?? Well that's all good because I just found the coolest mug ever for the retro gamer on your list.
Check out the Tetris Heat Change Mug from Vat 19. For a mere $14.99 you can sip on some old school gaming goodness while you get your caffeine fix.
Check out the video below to see it in action: