These are a perfect way to identify your Stanley and to give it a unique look. These are for the newer 2.0 Stanleys 30 oz or 40 oz.
They sit over the straw on the top of the cup. They may fit tight or slightly loose as all cups are slightly different. Choose a color for the base as well as the name.
Feel free to screenshot the color and send me a separate message if the color is hard to describe.