Mog

They appear to come w/ a cap, and allow you to leave the plunger in place?? I have a syringe of grease that's also good stuff (jet engine bearing grease, apparently...) that is similar to those (if not the same) Goes in the bag easy, holds a decent amount, etc, etc. I haven't ever had it open up in the range bag, or anything like that.... The Epoxy folks sell a reclosable syringe, actually 2 syringes in one as one contains resin the other contains the hardener, that works quite well. I'm still using the duo syringe I bought about 5 years ago.

Don't try this at home kids....I'm a professional!

Living and shooting (mainly in the summer) in Yuma, Arizona, the first thing that came to mind: Slide Glide Hot Mog