Cleaning & Housekeeping: Myself, Nuby

Sippy Cup Solution

Does anyone know of a sippy cup that actually works? I have been using the Nuby, which I liked, until my daughter realized that if she stuck her finger in the top, it would break the slots causing it to leak EVERYWHERE. Now I have around 20 Nubys with tops that leak. Augh! Please send me your tried and true answers. Thanks!!!