Sippy cups are a no brainer for any parent. For the car, the house, the zoo, or anywere, sippy's can be a must have.
Our guys have three sets at out house and a few more at each grandparents. With handles, without handles, tall cup, short cup, the boys seem to not prefer any particular style. They pay attention more to the contents and we pay more attention to the contents leaking out.
In this category you are one your own. Buy a few BPA-free cups and see which ones work best.