Mine is a cross. It is open like a bag, but it has stiff sides like the box. I trimmed one of those bucket pocket thingys and sewed it into the inside edge. Everything stands up in little pockets, there is a bit of center room for stuff, and there are pockets outside that house my cordless, lubes, glues and most common tools.
I cost me about $20 all together, and works great.
It does get a bit heavy though.