The Lifefactory 4oz glass baby bottle is designed for infants aged 0-3 months. Each bottle features a protective silicone sleeve that not only helps prevent breakage but also provides a comfortable grip for easy handling. Made from high-quality thermal shock-resistant borosilicate glass, these bottles are BPA-free and phthalate-free, ensuring safety for your baby. The set includes two bottles, each equipped with a polypropylene cap, ring, and stopper, along with an orthodontic silicone nipple. These bottles are dishwasher safe, making cleaning a breeze, and are manufactured in the USA and France.