Our Packout™ 18 oz insulated mug with sip lid features twist to lock Packout™ connectivity so you can attach your bottle to the top of Packout™ solutions, allowing for secure drink storage on the jobsite. The Packout™ 18 oz insulated mug with sip lid has double wall vacuum insulation, keeping drinks hot or cold all day. The impact-resistant body is constructed with thicker 18/8 stainless steel and a durable metal reinforced handle to withstand harsh jobsite environments. Our dishwasher-safe 18oz insulated mug comes with a leak-proof sip lid. Milwaukee® Packout™ is the industry's most versatile and durable modular storage system.