This marker is awesome. It's very permanent and only comes in white ink. Smash the living hell out of the nib to flare it out. Now it should give you a fat and fluid line. This marker is compact and fits into your pocket nicely.
The NY Fat will be a classic fat cap forever. It's just classic. On Montana Hardcore, it rules all. On Molotow Premium, it makes beautiful lines. On other paint, it's awesome also. There might be several types of fat caps available, but this is the OG fat cap. The boss. The one ring that rules them all. Well, it's pretty sweet.
This is a personal favorite of mine. It's clear so you can see how much ink you have left. It's soft so it squeezes really nicely. The nib is super durable and replaceable! And it's small so it fits in your pocket.
One of the greatest, and cheapest chisel tip markers available. Those cats at Pilot know how to make good products. Pilot Ink is a true black and super permanent. This marker is built very well and will last forever if you just refill it!
The Orange Dot is one of my new favorite caps. It's one of the most flexible fat caps out. It's not the fattest one out, but that's what's cool about it. You can still piece with it. It will fill areas super quickly and evenly. You can also get clean lines if you have quick hands. And it's good for bombing.