Nuby"s new insulated clik-it range of cups offers leak proof technology that you can see and hear so moms and dads won"t have to worry about spills and leaks. The no-spill insulated cool sipper keeps liquids fresh and cool and helps protect furniture from a sweating cup. Engineered to make feeding and handling easier. You will be delighted with the transition thanks to Nuby"s valve less, leak resistant design.