Re: float,
You can try jing hong guang chang, 㳡, near huai hai road. My sister bought a similar float for me at 25rmb = S$5 only. She noes all the cheap lobangs as she has been working as an intern in shanghai for a yr, and she is a shopping queen.
RE: Sleeping thru the night
I totally agree with The Chiangs abt keeping her full in the day time. Thats why instead of feeding her at every 3-4hr interval, i feed her at every 2+ hr interval from 6pm onwards. Guess baby's stomach are still small, so cannot take much milk at one go.