From the update:
Over at Aussie Block Dice we've cracked the $4000 mark, which means more Bottlecaps of course!
This second set of Soft Drink bottlecaps joins the original Beer Bottlecaps unlocked a while ago.
Plenty of the perks come with a free set of Bottlecaps, and anyone who's getting dice can just add an extra $5 for more caps.
Next stop, Uluru Twilight at $4500!