The 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 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 leakproof sip lid. MILWAUKEE PACKOUT is the industry's most versatile and durable modular storage system.