Thermos 18oz Stainless Steel Lidded Tumbler 532ml is designed to keep your drinks at the perfect temperature all day, thanks to advanced Thermos vacuum insulation that maintains cold beverages for up to 22 hours and hot drinks for up to 6 hours. Made from durable stainless steel, its built to withstand daily use while preserving the taste of your favorite beverages. The innovative slide lock lid is leak resistant when closed and straw compatible when open . while the Lumiview clear lid lets you easily check contents at a glance. A non-slip soft-touch base keeps the bottle stable and quiet on surfaces, and its slim design fits most standard cup holders. Easy to clean, its top-rack dishwasher safe, though handwashing is recommended for lasting performance.