Caulking gun cap

I made this to plug regular caulking tubes that don't come with a cap. This will prevent the drying out of your tube and has a small piece that goes in the hole to plug the hole and help keep the tip on. When the material inside the cap dries, it will prevent further drying inside the tube. Still trying it on different brands of tubes, so let me know if there are ones it does/doesn't work on. 

Printed with ABS takes about 6-8mins for one with 95% infill and a small brim around the base. Print with the small tip on the bed so that the stem inside will not need support.