According to other posts on this forum, glass bottles are not ideal for yeast carbonated sodas. If you don't know for sure how much CO2 the yeast are producing, you risk leaving the bottles at room temperature for too long and they could explode. On the other hand, if you transfer them to the fridge too soon, your soda will be flat. With plastic soda bottles there is no guessing - you know exactly when your soda is done carbonating because the bottles will be rock hard.
Some have suggested bottling most of the batch in glass, and using one plastic bottle as your carbonation tester. That seems like it would work, but I haven't tried it.