I'll add Gorilla Super Blue (not the gel) with the light blue cap to the list. It is medium viscosity and requires no extra caps or tips. I believe the bottle and cap are some type of polypropylene, and the cap has a built-in tip plug inside it. Never gets stuck shut. Tip never clogs. Gorilla uses a really thick plastic for their bottles to prevent those pesky air molecules from finding their way through the bottle and shortening the life of what's inside. Because of that, they partially fill the bottle, because it would be too difficult to squeeze if it was full. They even added a "fill line" mark to the label on the bottle to tell people "yes, this is normal". Again, been using the same bottle for years, and its not even close to being empty yet.
It works great at doing what super glue does, and also can be used as a filler for gaps, seams, and pin marks. Does a much better job of all 3 things than putty, without the tedious putty,sand, repeat process...and doesn't get toxic green, red, or grey dust all over everything. I put it on by itself on anything I want filled and let it cure overnight. Then I scribble on the cured glue with a black sharpie (serves as a leveling indicator), and then wet sand with running water in the sink with progressively finer grits of micromesh until all of the black sharpie is gone. Put primer on to check the fill job, and about 95% of the time, I can go right to paint. If I see any remaining gaps I missed, there's no toluene in super glue, so I can dab some on right onto the primer with no undesireable effects.