I've designed this support to storage my daughers formula milk boxes on Ikea Kallax furniture.
It will work on anything else as long as it's applied on an upper corner, and for any conical shaped objects of a simillar enough diameter.
These packages have a diameter of just under 130mm. The support is 145mm long.
It could probably be a bit thinner to save on filament but I wanted it strong enough for when I'm sleepy at 4am mixing the formula milk.
It has 3 holes on each side to hold it with wood screws, but I've only used two on each side.
PLA is absolutely fine.