The Kid Classic Sippy 12 oz water bottle was designed for babies 6+ months to toddlers. Lightweight single-wall design and small form is easy for little hands to hold. Klean Coat powder coat finish is 4X more durable, chip-resistant and safe for people and planet. Producing the safest, most environmentally friendly products possible is Klean Kanteen's top priority. This bottle is not insulated and should never be used for hot liquids.