The First Years Quick Serve Bottle Warmer may be the most versatile ever! Straight, angled, wide-necked, disposable -- it can heat any bottle quickly and evenly. Uses steam heat and a simple measuring system to consistently warm any bottle to just the right temperature. In just minutes, baby's bottle will be just the right temperature. No need to worry about hot spots or loss of nutrients from microwaving. Automatic operation and shut-off means you can tend to baby while bottle is warming.