I only used it once to put hot water in it and take it out with me. My child has not put their mouth on it, but please refrain from purchasing if you are concerned, as it has been stored at home. ※ The following is information from the official website. For your reference. ● Product Description 350ml children's water bottle. It is a 3-layer insulated stainless steel bottle that keeps cold drinks cold for up to 8 hours and warm drinks warm for up to 6 hours. It is a drink bottle that can keep drinks cold or warm, making it convenient for outings. It features a carry handle for easy carrying and a button-operated lid that opens with a single push. The drinking spout has an angled straw, making it easy for children of all ages to hold and drink from. With its simple design, it can be used not only by children but also by parents and children. ● Product Features ◆ Convenient drink bottle for outings and going to school Double-walled insulated stainless steel bottle with a carry handle. It can keep cold drinks cold for up to 8 hours and warm drinks warm for up to 6 hours. It has a convenient straw drinking spout inside the push button. The bottle is designed to be easy to hold even with small hands. ◆ Keeps cold and warm for a long time Cold drinks [350ml] can be kept cold for up to 8 hours, [500ml] for up to 15 hours, and warm drinks [350ml] for up to 6 hours, [500ml] for up to 8 hours. ◆ Bottle with carry handle The bottle is designed with an easy-to-grip carry handle, making it easy to hold even with small hands. Recommended for outings. ◆ Push button (one-touch) & straw drinking spout The lid is a button type that is easy for children to open. The drinking spout inside is a straw, making it easy to drink. ● Product Specifications Product Name Stainless steel drink bottle 350ml (stainless steel water bottle) / Insulated drink bottle 350ml Body color emerald forest Regular price 4,290 yen Target age 12 months ~ (around 1 year old ~) Material Stainless steel / Polypropylene / Silicone ※ Uses BPA, phthalate, and PVC-free materials. Capacity 350ml Overall size H19.9 × D8.5 × W7.5 cm Stainless steel part size H12.5 × D7.5 × W7.5 cm Body weight 270g