I was wondering what the pros and cons were for the two. I allways thought the plastic ones were just cheaper for them to produce, but I just got a new gun and it came with both and now I'm wondering if there are certain situations where one is better than the other.

Thanks!
Steve

Plastic cups are JUNK. Iam guessing it comes with a plastic screw on lid too?
Thats a sure fire way NOT to be able to get the lid off again.

Nope, it's like a press in job.

i used the plastic for the etch primer it will not stick to plastic as bad.gary

I have never had a problem getting the plastic lids unscrewed from my guns, especially since I started leaving D873 very slow reducer in my gun instead of lacquer thinner. Thinner draws moisture, which maked the lid hard to unscrew, where the reducer doesn't.