Baby pacifiers and NUK pacifiers are universal. NUK nipple is a product of German MAM brand. Its design has been patented in modeling and baby's habit of drinking milk, and it has become a standard accessory for baby bottles in the world. In terms of materials, babycare bottles and NUK bottles are also universal and can be used together. This means that if you buy a baby bottle, you can choose NUK nipple as an alternative or additional option to meet your baby's feeding needs. Of course, when choosing a nipple, you also need to consider your baby's age and drinking habits to ensure that you choose the right nipple type.