The MILWAUKEE® PACKOUT™ 18oz 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™ 18oz Insulated Mug with Sip Lid has double wall vacuum insulation, keeping drinks hot or cold all day. The impact-resistant body is constructed with .8mm thick 18/8 stainless steel and a durable metal-reinforced handle to withstand harsh jobsite environments. The dishwasher-safe 18oz Insulated Mug comes with a leakproof sip lid. MILWAUKEE® PACKOUT™ is the industry's most versatile and durable modular storage system.