The Nina Leakproof Twist & Lock Vacuum Tumbler w/ Straw features double-wall stainless steel construction with vacuum insulation. This sleek 18oz tumbler helps keep beverages cold for hours while preventing condensation on the outside. The innovative leak-proof screw-on straw lid features a convenient swivel lock function, giving you added confidence while traveling, commuting, or staying active throughout the day. Crafted from 91% recycled stainless steel with copper plating, the Nina combines premium performance with a more sustainable design. Hand wash. 18oz Capacity.