The Tru-Temp Bottle Warming System is designed to safely warm breast milk and formula. You can easily warm a 5oz bottle to the perfect temperature in just three minutes. For nighttime feedings, the removable, insulated cooler feature will keep 2 bottles cool for up to 8 hours before warming. Superior convenience has never been easier. Removable, insulated cooler feature keeps two bottles cool for up to 8 hours for convenient nighttime feeding Stainless styling matches home décor