amazer bottle brush cleaner, water bottles cleaner brushes with long handle, flexible bottle washer cup scrubber & round bottle scrub brush set, bottle cleaning brush set, 2-pack amazer <ul> <li>white bristles :soft white bristles are gentle enough to clean wine glasses, metallic surfaces, and plastic surfaces without scratching.</li> </ul> <ul> <li>blue bristles :little stiff blue bristles are specially designed for cleaning the hard-to-reach corners and bottom of bottles.</li> </ul> <ul> <li>notice:the bristles are very gentle. not recommend using to clean old and tough stains.</li> </ul> brush head has two types of bristles for daily use. soft white bristles are gentle enough to clean glassware without scratching, while the blue ones on the tip are firmer, making it perfect for the hard-to-reach corners and bottom of bottles.not stiff bristles. the flexible and long neck gives for easy reach inside a variety of water bottles, travel cups, glassware and more. the bristles are very gentle. not recommend using to clean old and tough stains. durable nylon bristles and a non-slip grip. soft and comfortable grip won't slip out from wet hands. there is a convenient soft small brush inside the handle, making this brush equally suited for cleaning pump parts, bottle nipples, small bottle accessories and more. easily stored in your kitchen caddy or hung from a hook.