I absolutely love the convenience of these cups. My biggest complaint is they are most certainly not spill proof, and it doesn't take a hard fall to knock the lid off. They are great to have on hand, but be prepared to be cleaning up spills.
Great cups. Between these and the sippy tops (both can use the same cups - both sizes, too) this brand provides years of beverage containers for you and your kids. Yes we use them too as juice glasses at breakfast.