I copped the black and white, they are very different products.
Awesome white pigmented paint (not ink kiddos!) Works beautifully in drip mops and steel tip markers. Yes it drips, and no it doesn't. The choice is yours. Works ok in Hit-n-go markers, but awfully streaky if you don't juice the hell outta the nib before each use. I like to write real fast, so it may work better with your style. Its not so hot in a UniBroad marker, it doesn't flow through even a flared out nib very well. You may be able to thin out with a solvent if you got your heart set on it. I didn't mess with it.
Heavy hitting, nasty, yucky-yucky stainer right here. This stuff stanks to high heavens so don't use it indoors unless you have some privacy or an escape route. I've only tried it in the toxic shocker mop but hot dam. Its real good. I wouldn't use it in a drip mop personally, but if you like drips and got the budget to ooze some high quality product -- one could do some real damage with the combo. The toxic shocker *almost* drips and that sucker doesn't squeeze at all.
This marker is NOT squeezable. The body is not soft at all and the sides turn white when you squeeze super hard, I think it would break if I squeezed it hard enough to create drips. All that aside, this marker is great for small, subtle bombings and for the pocket when a tougher tool isn't practical to carry. Easy to fill like any other valve marker if you have a widebore syringe or tiny funnel. The replaceable and reversible mob makes for a long life. I would definitely recommend buying it if you want a really small marker. Works great but shouldn't be advertised as squeezable, which was why I bought it. This thing with a splayed out nib is what 007 would use if he were a writer.
After trying to use male caps through the Sekt adapter on male cans I called ArtPrimo and asked them what I need to do to get a higher volume of paint laid down. They pointed me to this cap. This was the answer I had been looking for. If you are looking for high output, in order to lay down a fast fill, this is your cap.
With how accessible and quality Rusto paint is, it's almost a requirement to own one of these adapters. I use a mixture of female caps, and these adapters on every project. I have no had any issues with these and have actually purchased more so I wouldn't have to swap cans mid-project. I would recommend this to anyone using male cans.
I have been using this mop since February. It feels nice in the hand, I have had no leaking issues, the nib has held up quite well, and it holds a decent amount of ink. The only issue I have had is, once or twice I have taken the twisting lid off and the nib stayed inside of the lid. If you don't notice this and try to bust a tag you will dump ink all over. It seems the nibs should screw on too - and opposite thread of the lid threads, but thats just my opinion. Great mop. I would and likely will buy more.