Beverages stay cold for up to 12 hours! This hydration bottle features a double-wall insulation that creates an airless vacuum to retain maximum cold temperatures. 18-oz. reusable water bottle has an easy-to-open lid with popup straw. Sweat-proof design won’t leave water rings. Unbreakable stainless steel interior/exterior. Fits most cup holders. 3 assorted patterns—let us choose. From Thermos®. Hand wash. 9¼"H x 2½"-Diameter.