If you have traveled any distance with a child in your car, you know it takes about .04 miles before they spill whatever it is that they are drinking all over the backseat. And more often than not, it's something that will smell tremendously bad after only one afternoon of baking in the summer sun. Solve your problem with the Contigo AUTOSEAL Kids Stainless Steel Scout Cup ($19). Granted, your kids have to be developed enough to depress the button in order to take a sip. But once they are done guzzling, the cup autoseals, preventing you from having to take extraordinary measures to shampoo and dry every nook and cranny in the back of your sedan.