Great Tube Caps : Fits Mobil and possibly Others

Grease tube cap: Fits Mobil and may fit others. 
I had a entire shipment of new grease tubes get badly handled during shipping and arrive with the endcaps seals already  open. Since I cant use the entire case at once, I designed this solution to reseal the ends until I am ready to use them. I designed the caps to snap fit into the open end and not protrude outside the outer diameter of the tube. This way, I am able to slip the tube into my grease gun as normal without having a protruding edge of the cap getting in the way.  I have a small overhanging lip that runs around the top edge to act as a finger grip to pull this back out. I am not certain if it will be reuse-able once it is pulled out again, but my purpose for this is to be able to put these tubes back on the shlef and only pop open these seals when ready to use. They use only 6.8g of filament, so not concerned if it ends up being a one-time use. Time will tell. 
I printed these out of PETG for durablity and some flex when pressing into the grease tubes. They snapped in nicely into my Mobil tubes. You can always scale up of down the print to make it tigthe or looser for your application. Hope you find these useful! 
Thank you and God bless!