The Infantino Light Up Otter is a bath thermometer that provides a safe indication of water temperature. The adorable otter baby lights up in different colors depending on the temperature: red when the water is too hot, blue when it is too cold, and green when it is just right for the baby's bath. This reusable thermometer is practical for both parents and the baby, offering peace of mind during bath time. Additionally, the otter can also be used as a floating bath toy, providing fun during the bath. It is easy to maintain, requiring only wiping and drying after each use.