For me, the scuttle is all about keeping the suds warm for the pass 2 shave and lather for touch ups after that or a pass 3 if you do them. Some people like to build lather in their bowls so like a scuttle with a wider bowl. In my experience, the wider the bowl, the more heat dissipates. In any case we designed our scuttles so that we could get a maximum of hot water into the lower bowl to keep the upper bowl warm for the brush. I also use few ounces of hot water at the bottom of the top bowl to help conduct the heat from the lower bowl.

Special thanks to Chris Moss for his initial scuttle design.

I usually face lather so once I build up the suds the way I like them, I place the brush into the scuttle as I do the first pass. When I'm ready for pass 2, I squeegy the brush on the inside of the top scuttle bowl to get the excess water off and then face lather for round two. Same process for a third pass if you do it or just to hit the areas you want for the final touch ups.

Have fun.