Versatile Lifestyles - Use your tumbler in any number of activities and situations! 500ml flask can be taken just about anywhere - be that the office, gym, school, or out and about fishing or hiking. You can do all of this with the knowledge that, with the sweat-proof insulation and non-leaking screw lid, there will be no leaks or wet spots left behind! The base fits snugly into most car cup-holders, and the robust natural thick walled and stainless steel combination!