This is a vacuum adapter for a Black and Decker Dustbuster, model number NV7210N, I designed this to assist with removing the air from zip lock style bags.
My usage case is currently for longer term storage of filament in the rigid.ink zip lock bags, I wanted to remove as much as I could to help the dehumidifier packets keep the moisture content low.
This is just the first pass, and it works ok, at some point I will come out with a v2 with a longer tube perhaps with some taper to it. I will probably elongate the boss to further improve the usability.
This object is pretty flimsy in it's current state, I will try to improve the usability in the future.
Version 2 update
I have created a version 2 that is significantly stronger and more usable. The version 1 files will be kept for reference. I have included some draft angles on the internals of the boss to improve rigidity and a draft angle on the spigot to improve its rigidity and usability. The spigot and boss are both longer to make it easier to use. I find it easiest to insert the spigot into the corner of the zip lock bag, rather than in the centre of the seam.
I just put some supports in to help with the underside of the model, model was printed with the tube pointing upwards.