Made of non-scratch and odorless nylon bristles. Firm grey bristles on the tip are able to clean off the stubborn stains on the bottom and hard to reach areas, while the black bristles clean the body effectively. TPR rubber covered handle is designed for a secure, comfortable grip, which is non slip and brings you strong cleaning ability and allows for powerful scrubbing. Long reach 12.8 inch handle provides more convenience and helps reach deep into bottles and glasses. 2.3 inch brush head easily reaches into bottles, glass pitchers, and carafes. Great for cleaning glassware, water bottles, travel mugs, containers etc. Non-slip and ergonomic handle features with the hanging hole for easy storage.