In reply to Brian at work:
> What size and sort of bottle is good for a pee bottle for an expedition? Wide mouth like a nalgene or something else?
I use this one:
http://tinyurl.com/2go73
1.5 liters seems to be okay. It's collapsible so it doesn't take that much space from the pack. You just have to be a bit more carefull when using it.
> What about technique, do you sit up in your sleeping bag or do it laying down?
Laying down seems to be the easiest and fastest way. And you don't wake up your mate. It's a bit difficult to explain but I mean laying down "sideways".