The Milwaukee Packout Tumbler- Black, 30 oz. provides the longest temperature retention, keeping drinks hot or cold all day. Milwaukees Packout 30oz Tumbler has twist and lock Packout Connectivity so you can attach your tumbler to the top of Packout solutions, allowing for secure drink storage on the jobsite. The smooth open & close lid provides quick and easy sliding with gloved hands while keeping dirt and debris away from the tumbler's opening. Milwaukees Packout 30oz Tumbler is dishwasher safe. Milwaukee Packout is the industry's most versatile and durable modular storage system.