A one-part clip for all those bags that you've opened but haven't finished.

The widths are constant across each part so if you use a thick enough shell, there's no need for infill and it gets printed quickly.

This is me playing around with Autodesk Fusion 360.

P.S. it also works as a hair pin :D

I printed mine in PLA using a 0.4mm nozzle
The widths are multiples of 0.4mm so I configured my slicer to use 1.6mm outer shell thickness which was perfect for parts where no infill was used.
This reduces print time significantly and makes strong parts.