DD1 is 2 1/2 and I'm thinking it's about time she gave up lidded cups. She uses an open cup at mealtimes (though she still sometimes pours it everywhere), but I take a spillproof cup of water when we go out, and she has her morning and bedtime milk from a spouted (non-spillproof) cup.
Ideally I need something that doesn't spill easily to take out with us - a sport-top bottle maybe?
When did your children stop using lidded cups anyway? She doesn't seem to like the idea of milk from an open cup, especially at bedtime when she normally wanders about with it ...