Straws
I think the problem with straws is the air you suck in before the liquid gets to your mouth. This can cause bloating and gas. I have a contigo cup, but it works differently, you take the liquid into your mouth, then swallow. I started doing with straws, suck the liquid into my mouth, then swallow. This way I don't get any gas, like I did from using a straw normally.
RNY on 07/03/14
So glad you asked this question! I just decided to go back to my COSCO cup with the straw. I used to carry it all day long and drink and drink and drink. Since being forced to give it up, I hardly drink anything. It's like a mental block. I'm glad to hear it isn't bothering a whole bunch of people. I'm gonna give it a try tomorrow!!