The Föhn Adventure flask is built for warming or refreshing drinks, keeping liquids cold for up to 24 hours and hot for 12, making it perfect for all-day adventures. Föhn has used high-quality stainless steel for ultimate freshness and maximum flavour. For easy access, the Adventure flask uses a leakproof screw-top lid, giving you easy access and a wide mouth opening makes it easy to fill with 500ml of your favourite drink.  Easy to clean, make sure you hand wash only.