1515 tool holder, using "Nutella & Go!" container
These are brackets for clipping an empty "Nutella & Go!" snack container to 1515 aluminum extrusions (Kossel Clear, etc.), for use as a tool holder. These containers have two compartments, one shorter than the other, and are fairly sturdy considering their disposable nature. (Also: delicious!)
Unlike the fully-printed tool holder I linked to as an inspiration, these will fit the "giant" size Elmer's glue sticks (my bed adhesion aid of choice).