Sourcing materials to create a product that prioritizes environmental sustainability and human health. Lined with Purist Technology We created this technology by taking a naturally occurring compound, to create an inner barrier.It effectively stops contaminants from entering beverages and guarantees a seamless transition between drinks, without any metallic taste or lingering flavors. Surgical-Grade Stainless SteelCorrosion resistant HypoallergenicEnvironmentally SustainableLead free Double-wall vacuum insulated 12 hours hot / 24 hours cold depending on lid style