Stainless steel 5oz slow-flow bottle, for 0-6 months. (Excerpt from the internet) A baby-friendly Klean Kanteen bottle designed with safety in mind. Made from safe food-grade 18/8 stainless steel, it is free of BPA, phthalates, and other harmful substances. The inside is designed for hygiene, with rounded bottle corners for easy washing, and the interior is coating-free, so it does not affect the drink. I sterilized it by boiling, but ended up not using it, so I am selling it. There is a small scratch on the green part (photo 5). It feels like an initial scratch, but I'm not sure. - Brand: kid kanteen - Capacity: 5oz - Material: Stainless steel - Target age: 0-6 months Thank you for looking.