一田 - 125ml = $110 / 260ml = $120 (but they are hving sales right now, it should be 15% off)
I have bought a starter kit @千色 last month for $460, which incl: 2x125ml, 2x260ml, 1x1mo+ teat, cleaning brush and a pesifier... was a good deal at the time, but now with Jusco, WingOn, or 一田 on sale, the price for indivdule bottles should be even better at those places. Otherwise, you can buy buy multi packs from MotherCare.