Sometimes the ball gets a bit stuck so they can't actually get any water out. This happened with one of my bottles & my Syrian couldn't get any water unless I flicked the ball first. Luckily I have a spare bottle for such things. Sometimes if you fill the bottle right to the top, put the lid on tight then give it a couple of hard shakes that can do the trick. But you need to make sure when you lightly put your finger against the spout that water comes out. I'd say she knows how to use it as she drank when you held it like that but as you needed to squeeze it for it to work, I'd say the bottle might be iffy or, like I said, need a good shake
