Safety & Healthy: Safe and healthy: The steel wire of the straw cleaning brush is made of food grade 304 stainless steel, and the bristles are made of durable and soft nylon material without BPA. The top is designed with silicone glue to prevent scratches, making it safe and reliable to use Efficient Cleaning: Sturdy and soft bristles with a double helix design clean deeper on the inside of the item to prevent uneven cleaning Handing Design: The brush adopts a hanging hole design, which is easy to use and store, easy to find, and the hanging hole design makes the cleaning brush easy to dry and healthier to use Widely Used: In addition to reusable straws (plastic, metal, silicone, bamboo, glass), there are many different uses. Other uses include cleaning baby supplies and water containers, hair buildup in bathroom sink drains, musical instrument mouthpieces, tumblers for coffee, small fans, small items and other hard-to-reach corners Quality Service:For us, the most important thing is that you are 100% satisfied with our products, if you have any questions about your purchase, please let us know. We will resolve any questions or problems you may have within 24 hours and we are always here to help Pre-use Tips: Because the bristles are made of nylon, when you receive a product with bristles that are flattened or curled together, simply put them in hot water above 60 degrees Celsius and gently roll them. All the bristles quickly relaxed.