Any standard beer bottle should be fine as long as you follow a priming calculator. You can look up the correct calculations online. I have only had one bottle explode so far.
My fiancé found these re-sealable pouches at our local homebrew shop (think adult Capri Sun) that worked great. It...
Trader Joes and Whole Foods have a lot of the 100% fruit juices. At the very least, you don't have to worry about sorbates with them.
I used a lingonberry concentrate from Ikea to backsweeten a cyser that added a punch. They had some other flavors as well.