koala straw for stanley iceflow tumbler

It’s a great straw, and I love that it comes with a cleaner. I had been waiting for this company to make them for the 30oz iceflow tumbler, which is what I have. As soon as I saw it came out, I ordered. Unfortunately, the straw is slightly too small. It does fit, but any sort of slight shaking or moving the bottle causes it to fall out of the socket. So it can be annoying to have to unscrew the lid, stick your hand in and put the straw in again before drinking over and over, I.e. moving between classes.