Disclosure is directed to a preconfigured planar container template (“container template”) that can be assembled into a triangular shipping container (“container”). The container template is a substantially planar panel/flat sheet having a specified number of fold lines at specified positions in the planar panel, and which can be assembled into the container by folding at the fold lines. While not only assembling the container template into the container is very easy, making or manufacturing the container template is also very easy. The making or the manufacturing of the container template can include cutting a planar panel, e.g., made of some preferable material, into a container template of a specified shape and size and making a specified number of fold lines on the container template. The container template can be manufactured without using any securing products, such as glue and staple.