With Trimax, a triple insulated technology, you can keep cold drinks cold for up to 36 hours and hot drinks for up to 8 hours. No matter the temperature on the inside the outside of the bottle never sweats. Comes with a removable strainer that's great for tea, smoothies and all kind of beverages. BPA and Phthalates free. Top is interchangeable with the Eco Vessel flip spouts.