【Compatible】Compatible with Dr Brown Narrow baby bottles. Please note: This is an aftermarket product made by Giftophilia 【Baby Safety Comes First】Crafted from safe, food-grade polypropylene (PP) that’s BPA-free, ensuring worry-free feeding. Dishwasher safe on the top rack, and can be sterilized in boiling water for added peace of mind 【Perfect Seal for On-the-Go】Featuring a removable silicone seal ring, this lid ensures a snug fit with baby bottles, effectively preventing leaks. It's ideal for travel and storing formula or breastmilk 【Easy to Clean and Use】The simple design allows for effortless removal and cleaning, keeping everything hygienic and hassle-free. It’s hand-washable, machine-washable, and can be sterilized in boiling water 【Stylish Color】Two vibrant colors, these lids not only serve a practical purpose but also add a touch of personality to your bottles, making feeding time even more enjoyable Baby Bottle Caps