Stay hydrated with these snazzy looking thermos bottles! They keep chilled water chilled (and your-much-needed coffee, hot) while you're on the go, for approximately 6 to 10 hours! The bottles are made of aluminium (in lazy people slang; that means lightweight & resistant to the outside weather). Completed with a vacuum seal closer and a leak-proof design to keep all your drinks from 0 to 100 degrees safe and sound! And let's be honest, they are pretty good-looking, no?