This is a used insulated pouch that can hold a 500ml bottle. One side features Doctor Yellow, and the other side features a fire truck. While I haven't used it much, please be aware that it is a used item. Would it be suitable for a child who loves vehicles? Insulated bag with a Shinkansen and fire truck design, made with aluminum vapor deposition material for heat retention. - Colors: Yellow/Blue - Color: Red - Inner Material: Aluminum vapor deposition - Design: Shinkansen design - Design: Fire truck design - Strap: Adjustable strap Thank you for looking.