It Doesn't Add Up

Asian maths at work:

One 660 ml bottle of local brew, Myanmar = Ks 1 700.

One 660 ml bottle of Tiger, imported from Singapore = Ks 1 700.

One bottle completely filled two glasses so each beer mug holds 330 ml of brew.

Draft beer, the same expensive imported Tiger, costs Ks 700 per glass.  The same sized glass that holds 330 ml...

Solution?  Drink draft (and Tiger is colder and tastes better from the pump anyway) beer and save Ks 300 per round.