This patent document provides a design patent for the ornamental design of a can. The design patent includes 5 figures that show the design of the can from different angles. Figure 1 is a perspective view, Figure 2 is a top view, Figure 3 is a front view with identical right, left and back views, Figure 4 is a bottom view, and Figure 5 is a cross-sectional view along line 5-5 of Figure 2. The design aims to protect the specific ornamental design shown in the figures.