They are 8oz imperial sugar dr. pepper bottles. Pretty much the same as the Dublin dr. pepper bottles. depending on where you are they'll likely be hard to find. From what I understand they are only supposed to be distributed for 40 or so miles around Dublin, Tx(something to do with an ancient contract). I live in San Antonio (about 150 miles or so away) so occasionally you'll find someone who's got them.
I also bottled in pet bottles. When the plastic bottles firmed up the glass went in the fridge and I gave the plastic a little more time. I made a bottle bomb on my second batch of beer and I'm not totally sure If my wife has forgiven me yet lol just kidding. I just didn't want to take any risks.
I opened one last night very tasty but could have used a little more carbonation. I'll probably pull some out
And give them another day. It was indeed the ground cinnamon floating. Any suggestions on how to get the cinnamon taste without the undesirable effects of using ground?