Warm yourself up with a hot drink or soup â wherever you are! This Master Class stainless steel vacuum flask has a virtually unbreakable inner container, and keeps drinks and soups nice and hot for hours. Durable and Practical Design This 500 ml vacuum flask features an outer casing made from the strongest stainless steel. Combined with its durable inner container, it creates an airtight seal that helps prevent heat from escaping. It's tough enough to withstand all manner of bumps and scrapes in a rucksack - whether you're hiking or commuting on a cold day. Really Easy to Use Pouring yourself a drink is super simple. Unscrew the vacuum flask's insulated cap (its smart design means it doubles up as a handy cup). Then flick up the inner button on the stopper and pour. Its large body makes it easy to pour with complete control. Great for Chilled Drinks Too With its extra-wide neck, this vacuum flask is also great for a refreshingly cool drink on a sweltering summer day. You can fill it with plenty of ice cubes to keep your drink chilled.