1.Made of food grade bristles and stainless steel, BPA free and non-toxic, keep safe and healthy. Good grips let you feel comfortable to hold and use, make the cleaning job quick and easy. The hook provided to hang it for drying and storage.2.Durable - Each dishwasher-safe baby and water bottle brush cleaner features a sturdy handle and neck, stiff Nylon bristles, and rust-resistant stainless steel.3.Universal - If you need a water bottle cleaner to wash your favorite bottle, ours does the trick. 4.Versatile - This BPA-free bottle cleaning brush set is designed to give any water bottle, drinking glass, tumbler, wine decanter, set of kombucha bottles, and even the kitchen sink a good old scrub.