Specialized Purist Stainless Mover 18 Oz Bottle Ever 18 OzWith technology inspired by the lotus effect, we transform silicon dioxide, one of the most fundamental elements on the earth, into a flawless interior glass finish that keeps drinks pure. Scope top provides 360 degrees of perfect sipping at any temperature. Rotating outer ring adjusts to your preferred flow. Fits all Purist bottles. 12 hours hot 24 hours cold Double wall vacuum insulated Leak proof Surgical grade stainless inner Unbreakable interior