18oz Stainless Steel Double wall Travel Mug with Twist Locking Cap with and spill guard 18 oz. Stainless Steel Travel Mug, naturally BPA-free! Double wall Stainless-steel Inner Liner and Stainless Steel Outer Liner, insulates hot plus cold drinks for few hours Twist Locking Cap with spill guard Rubber Handle Dimensions 3.5" W x 8.5 H+