The Petal 2-way Bottle Brush (Straight / Rotating) is made from eco-friendly silicone for safe and hygienic bottle cleaning. Soft silicone bristles effectively clean the interiors of baby bottles, water bottles, and tumblers, with a tip for reaching narrow areas. Available in straight and rotating types for convenient use, the brush is boilable and microwave-safe for sterilization, making it ideal for maintaining cleanliness of baby feeding bottles.