This color-changing glass water bottle with silicone sleeve is shatterproof, leakproof and sweatproof – and spectacular! Inside is pure Pyrex glass you can trust. Outside is a 5-layer silicone coating with innovative color change technology. When you add a cold beverage to the water bottle, the spectacular design transforms. It has a wide opening that’s easy to fill and easy to clean – and a flip-top lid with a handy carry handle.