I got 2 gallons fro 8 bucks at costco, poured out a 1/4 gallon from each and stored in fridge (to be added back when bottled).
I dumped a 1/4 cup of us-05 yeast trub from a IPA I just bottled into the containers, put cap on and shook vigorously.
I took the cap off drilled a whole in it and put an air lock in both bottles.
these things are bubbling away now 12 hours later.
I've read a lot of posts on using original bottles to ferment and while I looked all over and couldn't fine the answer to what I wanted to know.
I am going to bottle them of into beer bottles and let them get carbonate and add some sweetness (hence saving 1/2 gallon of the juice).
How long can I let these sit in the original containers? I've read that plastic will leach oxygen but for a quick fermentation I figure it should be ok. I would still like to get an idea of how long is too long with the original containers.
(FYI they are PET #1)