I was wonder if anyone's baby had difficulty drinking water? My 12 month old can't get the hang of how to drink water, swallow and breath. She doesn't have the same issue when it is milk in the sippy, but when it is water, she takes in too much or doesn't swallow in time, and ends up gagging/coughing. This has happened both with a sippy, and also in a regular cup. I'm not pouring water in her mouth, I just bring it close to her lips and she sips, but she still takes in too much. Any ideas or thoughts? It's not every time, but it's about half the time. Thank you!