My dd is nearly 17 months old. She has been happily using a sippy cup since she was 6 months old. She's also got a couple of the beakers (same as sippy cups but without the handles). She has also recent started to drink from a sports bottle top but I was wondering when I should be trying to get her to drink from an open top cup without the safety net of the no spill lid? How do I go about it without water going everywhere?