You can use the standard bottle with this bottle warmer or a bottle with an extra wide neck. The Silicone milk bottle is the best choice for you, which is very unique in regards to their shape,and material they are made of and unlike most bottles, these bottles are made purely from silicone, which makes them soft and squeezable just like natural breasts. Or you can choose the glass milk bottle, it’s one of the most environmental and recyclable, that you can reuse the product again and again. And the milk in the glass milk bottle can be heated up in a short time.