However, I have come across a few things over the years that have really proven their worth. One of them is Gerber's sippy cups. Both of my kids easily transitioned from a bottle to a sippy cup, and used this cup into the toddler years.
This cup gives my toddler lots of independence, and I don't have to worry about spills. Plus, they are easy to clean because of the parts can be thrown in the dishwasher separately. And you can buy replacements for the little white piece that sometimes wears out or gets lost.
The kids love that color changing, though this feature fades over time.