No need for any sterile bottles for the RD3600 or RD. Your rotifers won't be sterile and I wouldn't advise trying to keep them sterile.
Currently no Macro-Feast, sorry.
One thing I would suggest is if you plan on buying rotifer cultures in hopes of splitting, etc, buy just 5m rotifers, a 5lb ClorAm-X, Liter of either RD and some rotifer floss. I find the rotifer floss really helps cut down waste in the rotifers and tends to allow for longer cultures (less prone to crashing).