With the Tommee Tippee bottle warmer, baby milk bottles are ready in no time. This bottle warmer can heat both prepared milk bottles and jars. This is a great convenience, especially when on the go. The included stainless steel bottle is simply filled with boiling water. Thanks to its excellent insulation, the water stays hot for many hours. The water is then poured into the accompanying cup, and the bottle or jar is placed inside. The warming process takes only a few minutes. After use, the water can be poured back into the thermos, allowing you to warm additional bottles or jars. Ideal for outings, holiday trips, or visits to Grandma and Grandpa.