Milwaukee PACKOUT 20 Oz. Black Insulated Tumbler. Milwaukee PACKOUT Tumbler provides the longest temperature retention, keeping drinks hot or cold all-day. The PACKOUT Tumbler features twist and lock PACKOUT Connectivity so you can attach your tumbler to the top of Milwaukee PACKOUT solutions, allowing for secure drink storage on the jobsite. The smooth open and close lid provides quick and easy sliding with gloved hands while keeping dirt and debris away from the tumbler's opening. The PACKOUT Tumbler is dishwasher safe. Milwaukee PACKOUT is the industry's most versatile and durable modular storage system.