BPA Free; Single-wall with comfort grip</br>Trap door under lid is designed for clean and easy shaking and mixing</br>Passionately engineered for 100% leak-proof shaking & mixing</br>Fits most car cup holders and under single serve brewers for coffee or tea</br>Top rack dishwasher safe lid and body; Easy grip to grab & go</br></br>Product Description</br></br>Make it?? shake it?? take it. - It might look elegant and pristine?? but the Shake & Go Tumbler loves to get a little crazy and shake things up. Contigo's Shake & Go Tumblers feature a trap door under its lid designed for clean?? easy shaking and mixing. It also features a leak-proof lid (when straw is removed) for on-the-go activities. Iced tea?? coffee?? water enhancers to more (ahem) adult beverages can be mixed with no leaks or spills.</br>