I had a munchkin cup that was passed on by a friend. It would always leak and I wanted something that if even dropped or thrown by my baby it wouldn't spill or break. Tum tum cup is super cute to look at but most importantly it does the job! It doesn't leak or spill when even thrown/dropped around. The straw is weighted so my daughter loves sipping from it. She sips milk and water comfortably from the cup. Highly recommend this cup for babies learning the new skill of sipping!