If you think about getting your own tumbler, you better grab this Shakesphere Double Wall Tumbler. This innovative tumbler comes with a flask, a shaker, and a thermos. It is an all-around product that will save you the hassle of carrying around three bottles at once. Beyond practicality, this double-wall tumbler keeps drinks hot for 8 hours and cold for 12 hours. Enjoy ice-cold smoothies and savor warm coffee every time! With its highly polished and non-stick interior, you will have a stylish and quality tumbler.