Infant tubs hold a small amount of water that gets dirty during bathing. After months of research and dozens of focus groups, we came up with an extremely simple solution. Why not add a drain to let dirty water drain out while fresh water flows in? Cleaner water. Cleaner baby. Perfect. Color-coded digital thermometer makes it easy to set the perfect temperature for baby's sensitive skin. Cleanwater reservoir holds fresh water for rinsing. Rinse cup included. Fits most single and double basin sinks.