Are you tired of mopping up milk? The Contigo Kids Leak Free Travel Mug might be the answer. This mug is WAY cooler than a sippy cup but still gets the job done. It is a 100% leak proof cup that has Auto-seal technology, which eliminates leaking and spilling. All you have to do is press the button to sip and release it to reseal. This BPA free cup is made with polypropylene. It is Phthalate and PVC free and dishwasher safe. It is almost too good to be true. We are also fans of the mommy version which holds hot liquids!