Hydrate smarter with the Otto Bottle. This classic, proven bottle model is updated with a commitment to responsibility, crafted from durable single-wall recycled PET (rPET). The translucent body and solid lid combine durability with alternative materials.The 30 oz. (890 ml) bottle is designed for enhanced convenience with a tethered twist-on lid that stays attached to the bottle neck, ensuring it's never lost when opened. It also includes a sipper disk inside the top for easier and more controlled drinking. This leakproof bottle is designed for cold drinks only, is BPA-free, and is FDA-approved, making it a perfect choice for everyday hydration.