These work great for pulling a vacuum on gallon size baggies storing filament.

With just the corner of the baggy open, insert the nozzle until it touches the filament. then as you trigger the hand vac, pull the nozzle out and clamp the bag shut (I have a video that I am trying to upload).

One fits the older Dyson and the other fit the new style nozzles for Dyson V8 and newer, Please take care to print the one that fits your vacuum.