Master Paint System MPS Disposable Paint Spray Gun Cup Liners and Lid System, 50 Pack Mini Size 6 Ounce (180ml) Kit - 50 Cup Liners, 50 Lids with Strainer, 1 Hard Cup with Retainer Ring and 20 Plugs

The only real flaw with these adapters is that the threadwell is shallow and it is prone to leaking. If you add an O-ring into the adapter, it will seal better, but then the adapter will spin when you mount and dismount the paint cups. Its good, just not great. Could be great if they machined the thread well a little deeper and added an O-Ring.

Missing retaining ring and no plugs like its supposed to come with.

it leaks all over the place. had to throw it in the trash. unusable

I love these cups! Some reviews mention leaks, I have had none but probably because I am very careful assembling the cups. The liners are cool, they drop into the hard cup. Pour the paint in, then put on the top(with the feed hole and integrated filter). This is tricky, it has a number of clicks as it settles into the liner. It has to be settled all the way in, kind of subtle, I suspect if this is not done then leaks will be had. Next is to screw on the black retaining ring. This too is fiddly, very easy to cross thread. I sight from the side and watch it go on. Also when screwing it on it can be screwed on too tight and skip threads, it needs to be just tight enough. There are no directions and very few if any online tutorials so I will continue. Once filled and capped keep the cup with the orifice pointing up and push the gun onto the cup. This has a few hitches/bumps as it goes on. Once it is completely seated twist one notch for complete seal. Then attach the gun to air and pull trigger with the gun upside down and all the air will be sucked out of the cup, leaving only paint in the now collapsed liner. Very cool! This is what lets you paint upside down without sputtering, paint keeps flowing. I tried to refill a cup and it didnt go well. If I need more paint I use a new cup. If I have lots left over I put the cup on top of my paint can and let the un-used paint dribble back into the can. Overall way better than the stock metal reuse-able paint cup, I will never go back!

This is the second box I used for automotive painting work same as the 3M but only half the price I’m very happy with this will keep using this product

They say they work with all PPS adapters. This is not true they do not work with PPS 2.0.

Makes cleanup so much easier and the cup last a long time

I put off going to cup system for a long time because I didnt think the cost was worth it since I dont paint often. These were at a price point that makes sense. I took the leap and bought the kit, several uses later I have no regrets. This product could be better though. The threads on the cups and black ring are a little too sloppy. This system is so close to perfect but I hope the sellers take the time to fix this.

Good product. Works as it should. No leaking. I’m not in production painting anymore but sprayed a couple vehicles with no issues

I have been using the 3M spray gun for a little while now and it is by far the best and easiest to use very quick clean up and very versatile with the different spray heads.