The First Years Smart Warmer warms without guesswork, and prepares the perfect bottle every time. Last function memory for convenient repeat use. Fits wide, narrow, angled, and disposable bottles. Features a ready light and beep with automatic shutoff. The Smart Warmer even thaws breast milk! Select the bottle type, contents, amount you are warming, and the starting temperature. The Smart Warmer preserves nutrients while bringing to an ideal temperature.