Ergonomic rubber grip won't slip. Rust resistant wire. Zinc-coated rust resistant wire twisted to hold fibers. Long handle bottle scrubber brush can be easily fitted into various water bottles, thermos cups, travel mugs, baby bottles, coffee mugs and more. Durable neck flexes supports heavy cleaning work and easy to clean bottle stains. Dishwasher safe. Dedicated to give everyone the very best house-ware products for all home needs with a focus on dependability our client satisfaction and great quality. Suitable for your all needs. The bristles have smooth feel and non-toxic smell are arranged neatly and densely, has strong toughness and anti-aging are safe to use. Made of food grade polypropylene and stainless steel wire, BPA free and non-toxic, free from foreign smells. Keep safe and healthy.