* Powder Coating for a durable finish * Double-wall vacuum insulated, 18/8 stainless steel * Copper-lining keeps drinks cold for up to 24 hours and keeps drinks hot for up to 12 hours.* Wide drip-free mouth and no-drip insulated lid* BPA and phthalates free Eco Friendly Bottles - Free Of Single Use Plastics* We have now eliminated all single use plastic packaging materials on our powder coated reusable bottles.