I hate spills! In the car, at home, anywhere...must learn to overcome this OCD! In the meantime, I love the Thermos Funtainer Bottle that I recently purchased a second set for my kids.
This thermos is made with the standards you might associate with the Thermos brand and I love the cute designs the kid's version comes in: Princess, Cars, Toy Story, Hello Kitty (to name a few).
The snap down lid can easily be opened with the press of the button to reveal a soft, flexible silicone straw. The kids love this feature, and I love that when closed it does NOT leak!
I do recommend that you hand wash the bottle due to the image peeling off after repeated dishwasher washings-bummer! The bottle holds more than an average sippy cup at 12 ounces, and will keep drinks cold for 12 hours.
The kids love these sippy cups and take them everywhere, and I love the no mess and sleek look that makes them perfect for kids ages 4 and up who don't want that "sippy cup look!"