Designed to clean water bottle and reusable straws. Ultra. Straw Cleaning Brush: Durable bristles for thorough cleaning. Long flexible brush to get around curves. Comfortable handle for easy grip and convenient storage. Best When Used with: Dawn dishwashing liquid. Customer Support: Toll free 1-888-318-8521 9 a.m. - 5 p.m. EST. www.dawnkitchen.com. Made in China.