I have my annual week long summer trip to New England coming and I think I may try to not check any bags this time and just go carry on. To accomplish this I will need to keep the contents of my Aeronaut pretty limited.
One thing that haunts me is packing reusable bottles like the one from Sigg or Nalgene. I use a water bottle and a Thermos for coffee everyday. It's to the point now where I cringe when I see a plastic water bottle and can't get myself to buy one at the store. But I'm not sure I should pack my Sigg with me because they do take up a good chunk of room. However I do like to drink water on the flight and we will probably do some hiking so water will be needed.
So, when you travel lite, do you try and make room for your reusable bottles or do you bite the bullet and buy bottled water during the trip?