The Thermos Stainless Steel Travel Mug is constructed of double wall foam insulation to retain hot or cold temperatures. It features an unbreakable stainless steel exterior with easy-to-clean plastic interior and a 360° drink lid - drink from anywhere on the lid. Comfortable silicone rubber grip. Fits most automotive cupholders. Non-slip, scratch-resistant rubber base. Twin Pack includes (2) 14-oz Thermos Stainless Steel Travel Mugs.