The classic yellow ducky is reinvented with White Hot technology that tells you when the water is too hot. Just place the ducky in the water and then check the White Hot indicator on the bottom. If it says HOT, add more cold water before putting in baby. The Munchkin White Hot Safety Bath Ducky features: White Hot Safety Disc indicates when water is too hot (approximately 104 degrees Fahrenheit and above) Fun, easy-to-grasp size and shape Water-tight to prevent sinking, squirting and mildew 0+ Months