Make any hour happy hour with a leak-resistant cocktail shaker that’s as durable as it is portable. It’s made with stainless steel, features double-wall insulation, and No Sweat™ Design so your drinks are consistent and cold from the first pour to the last. Compatible with Rambler® 10 oz Lowball, Rambler® 10 oz Stackable Mug, Rambler® 16 oz Stackable Pint, Rambler® 24 oz Mug, Rambler® 25 oz Straw Mug and the Rambler® 20 oz Tumbler. Features Easy press lid and 1oz twist cap. Leak resistant. Double-wall vacuum insulated vessel. Dishwasher safe.