Ok, I did it too- bought one of those 500Ml bottles and didn't realize just how much 500 ml's is!
So... I'm going to decant my new bottle into a couple of 100ml bottles for B&B members.
Took me a few days to find suitable bottles. You'll be getting a strong 100ml (closer to 3.5 oz (*edit* turns out it's closer to 4 oz)), shipped con US for $18