Spill proof sippy cups, do they really exists?

I need help moms, please give me some feedback on your experience with and reccomendations on sippy cups! We have 2 sippy cups that we are using right now and they both tend to leak here and there! They drive me crazy! Is there truly a sippy cup that does not leak? Please help if you have the perfect sippy cup...

These are the 2 that we are using: