Introducing the Heat-Cool Double Wall Bottle, an innovation in hydration technology. Crafted from 90% recycled stainless steel combined with 10% new stainless steel, this eco-friendly bottle commits to sustainability without compromising on quality. Its double wall construction ensures that your beverages maintain their ideal temperature for longer. The bottle's soft silicone carry ring lid provides convenient portability, allowing you to take it wherever you go with ease. What sets this bottle apart is its unique surface temperature adaptability — simply shake the bottle, and it can change its external temperature to reflect whether the contents are hot or cold. It also boasts a leak-free design to prevent messy spills. With a capacity of 400 ml, it's the perfect size for daily use. Moreover, this product can be personalized to make it uniquely yours, adding an extra touch of individuality to your hydration routine.