Atari Arcade Pint Glasses 50% off with Think Geek plus Free Shipping over $40 spend
You get a set of 4 and best of all Think Geek currently have a free delivery to Aus promo so if you are going to get some more stuff from them now may be the time.
The blurb on shipping:
Only economy shipping to the contiguous US, Canada, and Australia is free. (More on what qualifies for economy shipping)
Your cart total has to be at least $40, but can be more than that.
The shipping discount will happen automagically, and will show up on the last order screen. No need for codes.
This free shipping offer will only exist for a limited time, to be nullified at the Overlords' whim, so get in while the getting is good.