Keep your favorite tumblers and bottles always perfectly clean with the Zingies SB360 Cleaning Brush. Made from 100% silicone with a durable stainless steel handle and a unique semi-automatic 360° rotating head, it easily and effectively cleans tumblers, thermoses, bottles, cups, glasses, and reusable cups. Lightweight, hygienic, and easy to rinse, it is an essential accessory for every kitchen. / Also, in the materials listed in the features, silicone is not an available material option to ensure correctness.