Straw Sippies

DD is 2 and is biting through all the straws. Tommee Tippee even has one that they claim is bite proof, but DD still was able to chew through it and actually took a piece off. Replacing the straws is getting a little expensive (we use the insulated Tommee Tippee sippies) Any recommendations? I'm trying to get her to drink from the training cup, but its not working. She flat out refuses it and won't let me back into the lving room until I bring her her regular sippy. How long did it take your LO's to get used to the training cup?

Re: Straw Sippies

We stopped using straw cups because of that. We got "transition" cups before we went to the regular "training" cups.
We use ones from Tomee Tipee and Playtex. It took a couple of times for them to get how to use it since they were used to straws, but they did. Now they are doing pretty good with a regular cup.