Want a reusable bottle that doesn’t stain or give off a metallic taste? That’s what the Kokoro Thermal Flask is for. Not only is this a beautiful thermal flask, but it also has a solid porcelain interior. Because it’s a porcelain flask, the Kokoro won’t taint your favorite beverages with a metallic taste. Completely free of stains and smells, this bottle ensures your drinks stay hot or cold for at least eight hours. Available in both 450- and 550-milliliter sizes,..