Function: It is used to effectively clean the inside of bottles, reaching areas that are difficult to access with a regular sponge or brush.
Design: The brush typically has a long handle and soft bristles that are safe for use on baby bottles without scratching them. Many designs, like the one shown, also include a smaller brush for cleaning nipples and other small parts.
Hygiene: The use of a dedicated bottle brush helps ensure that all residue from milk or formula is removed, maintaining hygiene for the baby's feeding essentials.