Originally Posted by SeamusMac
FYI Growlers aren't manufacturer to hold the pressures required to naturally carbonate your cider. I'm not saying that they're definitely explode while you're trying to carbonate them, but they might.
If you want to carbonate your cider use twist-off or pry-off beer bottles.
So I've heard. I've seen and own growlers which I wouldn't dare try to carbonate. The ones I use seem really thick and have been used on several occasions for bottle conditioning, first sign of weakness in any of them and I'll quit using them; otherwise, they're so darn convenient when I'm low on regular bottles.