OXO Tot Bottle Brush with Nipple Cleaner, Green (Set of 4). Brush head has two types of bristles for gentle cleaning and serious scrubbing. Flexible neck for easy reach inside bottles. Silicone nipple cleaner gets into tight spaces and is ideal for bottle nipples, sippy cup or breast pump parts. Ventilation holes help nipple cleaner dry quickly. Soft, comfortable grip won't slip out of wet hands.