Multifunctional Design: This cup brush combines three functions: a lid brush, a bottle brush, and a crevice brush. It easily reaches into the cracks and corners of various cup lids for cleaning, truly delivering multiple uses. Ergonomic Design: The entire brush features an ergonomic design for a comfortable grip, and the flexible brush head easily reaches every corner of the cup for a thorough clean. Efficient Cleaning: The brush head is typically made of both soft and hard materials, effectively removing stains without damaging the surface. It also includes a small brush head specifically for cleaning cup lids, ensuring every corner is thoroughly cleaned. To use, dip the cup brush in a suitable amount of detergent and gently scrub the cup body and lid with a circular motion. Pay special attention to the inside of the lid and the crevices, as these areas are prone to harboring dirt and require careful cleaning. After cleaning, rinse thoroughly with clean water to remove any residual detergent. Finally, let the cup brush dry for future use.