I couldn't get my siphon restarted last time I racked off my beer so I decided to just pour the remaining beer into a 2-liter Diet Pepsi bottle. A plain soda water bottle would have been better, but you go with what you have. There was plenty of air space. I usually keg my beer but I have some carbonation drops on hand. I added 3 drops. For the volume, I should have used 4, but I don't need any bottle bombs. Will the airspace ruin the beer?
Two months later, the answer is yes. My kegged IPA version of the same beer was very nice. This beer was still drinkable, but it was dull with some slight sherry-like flavors. I didn't taste any Pepsi flavor. People talk about cardboard flavors from oxidized beer but I didn't get any of that, maybe it's just me. Next time, if there is a next time, I'll squeeze all the air out and add the four carbonation drops. If the pressure gets too high, I'll just release a little by loosening the cap temporarily. I think the 2-liter bottles hold quite a bit of pressure.