Many of the plastics used for these water bottles do transfer some O2 through the material which won't harm water but could affect your beer. Thus, depending on how long the beer is in this bottle it might not be a good idea. These bottles may also be very difficult to clean properly compared to using a traditional bucket. I would recommend against using one fom my own brewing experience.
North Liberty, Iowa
"Beer will change the world. I don't know how, but it will."