Secondly the lids are kind of silly. They have a pull-up nipple like a sports squeeze bottle, but since there's no air inlet and the bottle itself is rigid, you can only get a little tiny bit of water out at a time. You have to unscrew the lid anyway to get a substantial drink from the bottle without taking a rather long time at it. But the pull-up feature creates at least the theoretical possibility of leakage (doesn't leak in limited testing, but that's not saying much). I got these things hoping for absolute leakproofness so I could safely carry the bottles inside a backpack with my digicam, laptop computer, etc. They do make solid stoppers for these bottles so I guess I'll try to buy some.

Wow! I got kinda excited reading your post above. I really didn't know where you were going! And then I realized you
were talking about a water bottle! <img src="/images/graemlins/grin.gif" alt="" /> <img src="/images/graemlins/grin.gif" alt="" /> <img src="/images/graemlins/grin.gif" alt="" />

Censor alert! Censor alert! <img src="/images/graemlins/smirk.gif" alt="" /> <img src="/images/graemlins/smirk.gif" alt="" /> <img src="/images/graemlins/smirk.gif" alt="" />