Craig,<br>I have two of them. Both are quart sized, one has a regular screw cap and the other has a pull to open, push to close drinking cap similar to a Gatorade bottle. I have not toted them around full, much. I usually keep them in a fanny pack or survival kit as a backup container for my various canteens/Nalgene bottles, etc. They seem to be of pretty good quality, though....heavy plastic, and good seams.<br><br>