PTFE Tube Cap with Filament Holder. slight makeover, tighter fit, added keeper

changed the shape a bit so it can be grabbed easier. 

added a leash to keep it from running away.

Made the cap tighter both on filament side for better hold and tube side for better air tightness. it's a good fit for the PTFE tube i got (cheap Aliexpress stuff).  very tight initially but perfect after working it a bit. even better air tightness when pushed against the keeper. 

i want to keep as much air out of filament dry box as possible. 

drybox: https://www.printables.com/model/1102515-filament-drybox-reremix-designed-for-plastic-house

lid and filament port: https://www.printables.com/model/1103017-custom-filament-port-and-lid-for-drybox-based-on-p

more ergonomic shape

made the fit tighter on both tube and filament for better grab and air tightness 

added a keeper