Accommodates any universal wide-neck teat Heats faster than plastic in a hot water bath The flexible design converts into a cute container or puree pot later Stainless steel is 100% recyclable. It is not coated with toxic material, so does not produce run off. Its impact on the environment is minimal when compared to other materials and its lifespan is used and recycled Formula and breastmilk should not be heated in the microwave as it destroys critical nutrients. Stainless steel an ideal choice reputed for heating due to its speed, anti-bacterial properties, and durability. Lion & Lady baby bottles are safe, healthy and toxin free. Made from food grade stainless steel, this unique baby bottle is accompanied with an anti-colic teat to reduce air bubbles, encourage a good latch and relaxed feeding experience. The lid is manufactured free from BPA and BPS. It contains measurements to be used before filling the bottle. The lid also doubles as a hot water bath to heat the contents quickly.