I also weigh in the morning, before breakfast, after the bathroom. I find that my pjs are light enough that they don't make an ounce of a difference if I weigh with them on or off. So I weigh with my pjs on.
FYI, I just calculated this right now, so I figured I'd share with you ladies.
1 Liter = 2.18 lb
1 Liter = 33 oz (a typical water bottle is 24 oz)
I found it interesting that drinking a bottle and a half of water will result in a 2lb gain.
