Maybe that's why L seems to suck and then let half of it spill out her mouth now? it's kind of lazy, so she's not really thinking of it. she used to be real good with it, now we spill more than we take in I think. i guess we are the lazy ones too as it's a great way to get water into her - it's around all the time, that's why I did it, to get more water in her. I didn't give her a sippy for ages due to her biting me while I bf her (the ABA recomended not to get the hard nipple ones).
Thanks for all the great info and advice. very interesting!