S.P. wrote a review of Platypus Platy Plus Bottle on February 4, 2009
I use them everyday at work (w/ the optional insulating sleeve and sport top) and love that they can fold flat when I am done and don't make water taste like plastic. Definitely agree that they don't clean out well. The one I bought is a replacement for one I had for a year before it grew mold I couldn't get rid of. Bought a bottle brush, too, this time around so hopefully it won't happen again.