IRON °FLASK Co-Pilot 40oz Insulated Tumbler with Flip-Cap Straw

The IRON °FLASK Co-Pilot is a double-wall vacuum-insulated stainless steel tumbler in a popular 40oz capacity with Twilight Blue finish. It features a flip cap lid with straw designed for leak-proof sipping and fits standard cup holders. Made from 18/8 stainless steel, it keeps drinks cold for hours and hot drinks warm, making it versatile for coffee, water, and cold beverages. The tumbler is BPA-free and offers solid everyday performance at an accessible price point. It competes directly with Stanley, Owala, and Hydro Flask in the mainstream insulated-tumbler category. Iron Flask maintains a solid reputation for value-oriented drinkware with consistent build quality and positive user feedback for all-day temperature retention.