The Mighty Flask is a great double walled, stainless steel, beer drinking vessel. Fantastic to have for tailgating, the beach or a house party. Use this 40 oz. flask any place that glass would be a problem. The screw down top keeps the carbination in so it will keep your beer or soft drink bubbled up. Go to your favorite microbrewery and let them fill it up. Materials: Stainless Steel and Plastic Dimensions: : 3.5"L x 3.5"W x 11"H; Weight: 0.75 lbs.