Thanks Hikermor.

To add to what I posted before, at the risk of droning on:

The water bottles I like for pocket carry or in small bags are the flask shaped ones. There are various sizes available, and I prefer the largest opening I can find to ease refilling. There is a bottled water company that I like (normal disclaimer) called FRED. They make flask shaped bottles specifically to make them easier to carry. If it is not convenient to carry, you will not carry it, and you will not have it when you need it. The FRED bottles can be carried in a pocket if necessary. I carry them often in a jacket pocket, and they fit well in a little Kelty sling pack I have.